Talk:Electrocardiography

message: Talking about QTc, how about providing the references to Bazett's and Rautaharju's publications??? <BR>JFW | T@lk 11:15, 7 May 2004 (UTC)
thread_title:  "Untitled" re suggested QT<sub>c</sub> ref 

message: === move to electrocardiography? ===
like electroencephalography - Omegatron 18:20, Apr 19, 2005 (UTC)
: That sounds like the right thing to do. Jonas Olson 21:49, 22 Apr 2005 (UTC)
replies: text: It IS the right thing to do. Then there could be a discussion of invasive electrocardiography, which is an important procedure these days. Lou Sander 15:29, 14 January 2007 (UTC)
replies: text: It's okay with me. MoodyGroove 00:47, 16 January 2007 (UTC)
replies: text: This definitely should be moved "To be consistent with EEG, EMG, EOG, ERG and any others. --83.146.15.165" (from Wikipedia:Requested moves).  Since the discussion has been open for 4 years with no opposition, it should be non-controversial.  Therefore, involvement of Wikipedia:Requested moves is not really necessary, and I added  to electrocardiography.  --Scott Alter 01:11, 13 March 2009 (UTC)
thread_title: Requested move

message: like electroencephalography - Omegatron 18:20, Apr 19, 2005 (UTC)
: That sounds like the right thing to do. Jonas Olson 21:49, 22 Apr 2005 (UTC)
replies: text: It IS the right thing to do. Then there could be a discussion of invasive electrocardiography, which is an important procedure these days. Lou Sander 15:29, 14 January 2007 (UTC)
replies: text: It's okay with me. MoodyGroove 00:47, 16 January 2007 (UTC)
replies: text: This definitely should be moved "To be consistent with EEG, EMG, EOG, ERG and any others. --83.146.15.165" (from Wikipedia:Requested moves).  Since the discussion has been open for 4 years with no opposition, it should be non-controversial.  Therefore, involvement of Wikipedia:Requested moves is not really necessary, and I added  to electrocardiography.  --Scott Alter 01:11, 13 March 2009 (UTC)
thread_title:  move to [[electrocardiography]]? 

message: "through the interventricular septum. Very wide and deep Q waves do not have a septal origin, but indicate myocardial infarction."
:all these medical words (all over the article) need either linking or explanatory text in the article itself, for us laymen. - Omegatron 18:30, Apr 19, 2005 (UTC)
The Q-wave normally indicates the phase during which the septum depolarises. However, a similar change (but much more pronounced) is seen in the hours after the onset of a heart attack. JFW | T@lk 10:24, 20 Apr 2005 (UTC)
thread_title:  jargon 

message: I've heard that electrocardiogram (ECG) is pronounced EKG so it would be easier to differentiate from EEG in speech, it's also phonetic, not because cardio- starts with K in german  Prometheus235 14:27, 14 Jun 2005 (UTC)
replies: text: Agree. Bart 12:29, 9 October 2007 (UTC)
replies: text: This practice of pronouncing ECG as "EKG" is an American idiosyncrasy, not used where British English is spoken. NRPanikker (talk) 00:47, 13 June 2008 (UTC)
replies: text: The usage of EKG is not merely for pronunciation, as your comment would suggest, EKG is often written out as well. ECG seems to be primarily used in marketing, presumably due to its use in British English making marketing more widely applicable. 216.196.204.110 (talk) 15:09, 22 April 2015 (UTC)
thread_title:  EKG-ECG 

message: The article on Willem Einthoven (Nobel Prize winner for his EKG work) is currently quite stubby. Could someone with expertise in this area expand his article a bit? Sayeth 21:21, 6 February 2006 (UTC)
thread_title:  Einthoven article 

message: The figure [] labels the PQ segment as a PR segment. —Preceding unsigned comment added by 194.171.252.100  (talk • contribs)  19 Sep 2006
:My understanding:  The QRS complex may have one of Q, R, or S, or a combination or even another R (r'), but the segment is always called "PR" by convention.  A-giau 09:53, 29 September 2006 (UTC)
replies: text: That is correct. PR is used by convention because not all QRS complexes have a Q wave. Granted, not all QRS complexes have an R wave, but such complexes are generally labeled QS complexes, and the PR interval is the PQ interval. MoodyGroove 22:34, 22 January 2007 (UTC)
thread_title:  Figure 

message: I am reading Fundamental Accounting Principles (18 edition, Wild, Larson, Chiapetta, www.mhhe.com/wildFAP18e McGraw-Hill Irwin) and on page 314 it says "There's a new security device -- a person's ECG (electrocardiogram) reading -- that is as unique as a fingerprint and a lot harder to lose or steal than a PIN. ECGs can be read through fingertip touches. An ECG also shows that a living person is actually there, whereas fingerprint and facial recognition software can be fooled."
It would be interesting to add this information to the article, and if anyone has any more information reguarding this. I'm not sure how to reference it or where to put it, so if someone else could do it, that would work.— Preceding unsigned comment added by 66.68.213.216 (talk) 19:21, 22 November 2006
: Sounds like a bit of a tall story to me. --John24601 11:49, 23 November 2006 (UTC)
thread_title:  ECG as Security Device 

message: Oxford DNB credits Alexander Muirhead with using an electrocardiogram as early as 1872. I've credited him with this 'first' though others exploited it. Ephebi 16:10, 27 November 2006 (UTC)
replies: text: There have been many developments in instrumentation, and they are not covered here at all. Today's ECG machines often provide computerized interpretation, for example. Lou Sander 13:30, 26 March 2007 (UTC)
replies: text: Yes they do. In fact, the GE-Marquette 12SL ECG interpretive algorithm is the industry standard. It has an excellent specificity for acute myocardial infarction. MoodyGroove 02:30, 14 April 2007 (UTC)
thread_title:  History 

message: Could we please get an image of an electrocardiograph from after a hundred years ago? I don't want people thinking doctors still use EK graphs that look like they were commissioned to be built by the tsar. VolatileChemical 10:55, 3 January 2007 (UTC)
thread_title:  Pictures 

message: Discussion of posterior leads needed.— Preceding unsigned comment added by 147.188.80.202 (talk) 14:55, 14 February 2007
:There is a discussion of posterior leads in the electrocardiogram section.MoodyGroove 15:12, 14 February 2007 (UTC)
replies: text: I'm sorry, I got this confused with the myocardial infarction article. There is a discussion of posterior leads under the electrocardiogram section of the myocardial infarction article. I'm not sure whether or not this article would benefit from a discussion of posterior leads, since it's a rather obscure tactic for detecting myocardial ischemia in the distribution of the circumflex artery. At it stands right now, I'm okay with it being in the myocardial infarction article. If we're going to go that far here, then there are a great many other things that need to be included, and it seems to me that this article should be a general overview of electrocariography. That's not to say I would fight someone if they wrote a section for non-conventional leads, I just don't know that it's necessary for this article. MoodyGroove 17:23, 14 February 2007 (UTC)
thread_title: Posterior Leads

message: Hi, the above named image from this article needs to be changed as there is a slight mistake. The second arrow down is pointing the wrong way, so is identical to the diagram above it. The negative deflection on the ECG should be represented by current moving away from a positive electrode. Thanks. Djsilverspoon 16:01, 3 April 2007 (UTC)
replies: text: Previous version of the image has been restored due to unintentional error in .svg image. MoodyGroove 02:26, 14 April 2007 (UTC)
thread_title:  Image:ECG Vector.svg 

message: I removed this section from the article:
:The ST interval comprises the ST segment and the T wave. The fetal ST interval may be analyzed during labor (ST analysis) to identify fetuses at risk for asphyxia. Changes in the ST segment and increased T wave height (in relation to the QRS complex) are indications of fetuses at risk. (Neilson JP (2006). “Fetal electrocardiogram (ECG) for fetal monitoring during labour”. Cochrane Database. )
In my opinion, this gives the concept of an 'ST interval' undue weight. It's an obscure, minority concept in electrocardiography, and not particularly notable. I've heard it referred to as the JT interval (J point to end of the T wave) which is a more precise description. The JT interval is used to estimate the QTc for patients with a baseline intraventricular conduction defect. But no one talks about an ST interval (or JT interval) in common practice. I'd like to see more references to prove this measurement is notable. MoodyGroove 20:31, 10 April 2007 (UTC)
thread_title: ST interval

message: Should the middle image in this diagram not feature the depolarisation moving away from the positive electrode to cause a negatively deflected wave? richard —The preceding unsigned comment was added by 81.129.83.203 (talk) 09:35, 13 April 2007 (UTC)
replies: text: Yes it should. The old version of the image is correct. MoodyGroove 15:07, 13 April 2007 (UTC)

text: The old image has been restored until such time as the .svg image is corrected. MoodyGroove 02:27, 14 April 2007 (UTC)
thread_title:  Deploarisation wavefront and postivive electrode diagram 

message: I would like to suggest that this article be assessed by an expert for Good Article status.  (Reason that I am not adding this directly to WP:GA/N is that I specifically request that the evaluation be done by an expert.) 69.140.164.142 04:48, 19 April 2007 (UTC)
thread_title:  article assessment 

message: While working with the Electrotridoshagraphy technology , which is an Ayurvedic whole body scan and is also used for status quantification of the Ayurvedic basic principles, the inventer of the ETG technology Dr. Desh Bandhu Bajpai have innovated presently ECG machine, which is an advance level achievement of the Electrocardiography. Conventional ECG machine can diagnose whether the sick person is suffering from cardiac disorders or not. But this innovative machine is able to diagnose, if the complaints are due to Thyroid, pulmonary circulation, Muscular or neurogical problems, epigastritis, Pancreatitis, renal problems etc. user:debbe,28 April 2007,11:19 PM IST. — Preceding undated comment added 17:42, :42, & :45, 28 April 2007
:Unfortunately, you cannot reference your own blog for such extraordinary claims. As I noted on your talk page, it appears as though you have a direct conflict of interest concerning this device, and even if you didn't, your claims would need to be appropriately sourced because original research is not allowed on the Wikipedia. Good luck! MoodyGroove 17:56, 28 April 2007 (UTC)
thread_title:  ECG innovation and ETG 

message: I removed this comment from the article:
:Due to the inherent subtleties in interpretation only paramedics and qualified physicians should make treatment decisions based on rhythm analysis.
This is inflammatory, and it simply isn't true.
--MoodyGroove 21:47, 2 May 2007 (UTC)
thread_title: Who makes treatment decisions

message: I was reading the chapter in Harrison's on electrocardiography and I wanted to review it in an article on the level of the general reader (which is what Wikipedia is supposed to be).
This entry has a lot of interesting background, particularly the history, but it's pretty difficult reading, for all the reasons people have already given.
I think of a prototypical reader of Wikipedia as a technical person who may not know much about medicine but who just had a diagnosis of heart disease and wanted to understand his EKG. Or it could be an intelligent high school student (or anybody) who's curious. Such a person couldn't understand this article.
For example, if I didn't know what a depolarization vector was, I couldn't figure it out from reading this article. The sections on the limb leads and precordial leads don't clearly explain what the purpose of those leads are (to identify the direction of the vector in the frontal and horizontal plane, respectively, as Harrison's explained it).
The curious thing about this article is that it starts off to explain something, and then goes off on a digression. The section on limb leads starts to explain what they are, and then goes off about Einthoven's buckets of salt water. I realize this is interesting to you (and to me), but an ordinary reader can't follow this if you keep interrupting with historical footnotes.
Richard Feynmann (and others) said that, if you can't explain something to a 12-year-old, you don't understand it yourself. An intelligent high school science student could get through the Harrison's chapter. And there's the idiot's guide to EKGs, Dale Durbin's "Rapid Interpretation of EKG's". It's not an inherently difficult subject. Nbauman (talk) 00:54, 20 January 2008 (UTC)
thread_title:  Language is too technical 

message: :   The following yellow boxes in this section demarcate a large edit (whose content includes 7 subsections of this section, & nearly all of its remaining subsection) made with attention that (in light of its inclusion of extracted content contributed on a different page by another editor) was inadequate to documenting the scope of the contributor's sigs. And later -- as if that were not enough! -- an IP inserted an unsigned contrib within the content of the large edit.
:   (With overwhelming frequency, a single unsigned tag is used on a contribution that had included no sig. Even tho this single contrib -- corresponding to one click on "Save" that resulted in an entry on page's and the contributor's edit-histories -- already included several copies of the same sig, i have added add'l unsigs at points where absence of a sig compromised clarity and consistency.)
--Jerzy•t 01:28, 8 June 2013 (UTC)
replies: text: The uns contrib in the following pink box was inserted within the previous discussion surrounding it; the  call following it is supplied by me.--Jerzy•t 01:28, 8 June 2013 (UTC)
replies: text: Another voice, I have enjoyed reading EKGs for many years. None of my four adult sons has the least bit of interest in this topic but all read Wiki on a regular basis. If I could "dumb this down" to their level they would still not read it. This area is incredibly technical and not easily broken down to easily written bites but the literary goal is noble. How can I help?  —Preceding unsigned comment added by Lbeben (talk • contribs) 00:57, 25 May 2010 (UTC)
thread_title: Introduction

message: Toozdaygirl, instead of saying,
"It is the most painless, inexpensive and quick way to measure and diagnose abnormal rhythms of the heart."
isn't it simpler to say,
"It is the best way to measure and diagnose abnormal rhythms of the heart."
I think that's what the source, Braunwald, says.
Is there a better way to measure and diagnose abnormal rhythms? Is there a better way that is painful? Nbauman (talk) 15:58, 18 February 2008 (UTC)
thread_title:  Abnormal rhythms 

message: It appears that the color coding of the electrodes for the limb leads is different in different countries. And this seems to be just the just the right place to find out more about it. I guess a small table is the easiest way to do so. Feel free to add or not to add a respective link as you see fit. --Dietzel65 (talk) 09:34, 7 May 2008 (UTC)
thread_title:  Color code of limb leads 

message: as described in the article.
Note: This appears to be the American Health Association (AHA) recommendation 
Used in which countries?
*USA (white on right, smoke over fire, clouds over grass).  Welch Allyn PIC50 defibrillator manual. Page 57, manual section 4.7. 19mb file, so use a fast connection.
JPINFV (talk) 20:59, 12 May 2008 (UTC)
thread_title:  RA=white LA=Black LL=red RL=green 

message: Called "traffic light code", at least in Germany.
Note: This appears to be the International Electrotechnical Commission (IEC) recommendation 
Used in:
*Germany  --Dietzel65 (talk) 09:34, 7 May 2008 (UTC)
thread_title:  RA=red LA=yellow LL=green RL=black 

message: Are there additional color codes used anywhere? If so, please add them.— Preceding unsigned comment added by Dietzel65 (talk • contribs) 09:34, 7 May 2008
RA=Red, RL= Blue, LL=Green, LA=Yellow  — Preceding unsigned comment added by 117.228.60.17 (talk) 16:07, 2 August 2011 (UTC)
thread_title:  RA=? LA=? LL=? RL=? 

message: According to Jaakko Malmivuo & Robert Plonsey: Bioelectromagnetism - Principles and Applications of Bioelectric and Biomagnetic Fields, Oxford University Press, New York, 1995. chapeter 15.1 Clément Ader was the inventor of the string galvanometer. They cite Ader C (1897): Sur un nouvel appareil enregistreur pour cables sousmarins. Compt. rend. Acad. Sci. (Paris) 124: 1440-2 as source for this statement. Which is older than all papers by Einthoven on this subject.
see:   —Preceding unsigned comment added by Frodo Muijzer (talk • contribs) 10:28, 20 October 2008 (UTC)
thread_title:  Wasn't Clément Ader the inventor of the string galvanometer instead of Einthoven. 

message: I did a major edit of a small section just now.  I removed a lot of historical info that I didn't think belonged in a section that a lot of people were probably going to view as (a) confusing enough already and (b) the practical "how to" section of the article.  See above discussion of readability if you have thoughts of adding technical jargon back into this section. Btw, ELECTRODES go on the body.  LEADS are the signals. Walking Softly (talk) 10:13, 11 May 2009 (UTC)
replies: text: References don't work on talk pages, and create an error at the foot of the page, so I have taken the liberty of moving your reference out of its <ref> tags.  Card Zero  (talk) 14:50, 8 March 2011 (UTC)
replies: text:    Actually, they do work, bcz we have the technology for that; it's called  and it presents a list (of all refs since the last use of the template?), intended to typically display the refs in a talk-page section, or, i think, subsection; see the example at the end of this section, reflecting my restoration of WS's ref, and my addition of this one:Hofstadter, Gödel, Escher, Bach ... --Jerzy•t 06:39, 8 June 2013 (UTC)
thread_title:  Edit of Limb Leads section 

message: The diagram is horrendous.  The precordial leads aren't even properly placed.  I am going to change the caption to make it misleading no longer, but the whole picture needs to go.  Can we please have someone do a new diagram?  If someone is artistic, please let me know, and I will point you to a proper diagram to "adapt."Walking Softly (talk) 10:13, 11 May 2009 (UTC)
thread_title:  Image of 12-lead ECG 

message: I have added this sentence in brackets, as I did not understand the purpose of Wilson's central terminal was.
(recall that Wilson's central terminal is the average of the four limb leads. This will approximate ground)
I am only a lowly first year medical student, so if it is wrong, please correct it. M0rt (talk) 07:49, 13 May 2009 (UTC)
thread_title:  Wilson's central terminal 

message: ECG should also have info about vector cardiograms  —Preceding unsigned comment added by Syeda Fizza Batool (talk • contribs) 11:05, 30 June 2009 (UTC)
thread_title:  vectorcardiograms 

message: I am not shure, how short the PQ segment can be, but it must not be longer than about 120ms, because the PQ intervall must not be longer than 200ms.  —Preceding unsigned comment added by 131.220.35.12 (talk) 21:52, 28 January 2010 (UTC)
thread_title:  "Untitled" re lengths of PQ features 

message: heart is a massive problem  —Preceding unsigned comment added by 174.114.236.189 (talk) 02:35, 12 February 2010 (UTC)
thread_title:  Cardio 

message: I came looking for some info about EKG machines, but this page seems to be concerned mainly with biology/medicine of EKG. I'd expect at least a block scheme and short text commenting that & linking to respective electronics articles, eg. Instrumentation amplifier, Transient voltage suppressor etc... Would that belong here? VladimirSlavik (talk) 11:53, 18 November 2010 (UTC)
replies: text: If you are capable, please include this information.  Remember the reading of EKGs is most important so any physics/technical information regarding EKGs should be included at the bottom.  I need to spend more time with PDEs before I feel comfortable summarizing information I have in a few biomechanics books and a mathematical physiology book I have regarding EKGs.  If you want to know, in general, how they work, it's a pretty simple process of putting two electrodes at different parts of the body and recording voltage disturbances in body's surface potential generated by the heart's electric potentials as a function of time and direction.  They're not complicated machines at all unless you get one of the fancy ones that makes you a 3d representation of the heart's potential vectors on a screen. Bloomingdedalus (talk) 17:42, 19 June 2011 (UTC)
thread_title:  technical POV 

message: I just cleaned this up. I have not removed the "needs cleanup" template, because the long paragraph starting "the time intervals between consecutive heart beats" has a funny smell. It all seems like useful technical information - I wouldn't know - but it was all added at once, was duplicated in cardiac cycle (I have removed it from there), and spoke gushingly (I have removed the gushing) about this wonderful new process called CZF, then linked to a website which, as well as telling you all about it, will sell it to you. So I don't think it needs a stylistic cleanup any more, but it needs checking out by somebody who knows anything about electrocardiography (not me).  Card Zero  (talk) 14:47, 8 March 2011 (UTC)
thread_title:  Electrocardiogram heterogeneity section 

message: The section on waves explains both waves and segments but leaves out the Q wave and R wave. It would be helpful if someone could break down the reason for the QRS morphology.
AriaNo11 (talk) 16:49, 30 March 2011 (UTC)
thread_title:  Q wave and S wave 

message: Within the ekg coding, is the tangent function involved in anyway?  —Preceding unsigned comment added by 68.19.159.27 (talk) 23:00, 12 May 2011 (UTC)
thread_title:  The tangent function 

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thread_title: File:Cardiac Cycle Left Ventricle.PNG Nominated for Deletion

message: I would like to include more information about the physics of Electrocardiograms, but will probably need to spend a little more time with Partial Differential Equations before I am ready to contribute this material.  As such, I am giving this article a "start" rating for physics given that it has very little information about the technical properties of electrocardiography.  It is an excellent introduction to ECGs for medicine, but it does not include the physics, just to be clear I mean no insult to the persons who have written this by calling it a "start" rating for the Physics project. Bloomingdedalus (talk) 17:32, 19 June 2011 (UTC)
thread_title: Physics

message: The section on ECG graph paper starts by saying it is standards to scale the y axis at 1mm per mV, but ends by saying 1mV must move the stylus 1 cm (i.e. 10 mm per mV).  I believe the latter is correct.  — Preceding unsigned comment added by 81.129.213.76 (talk) 12:23, 8 January 2013 (UTC)
thread_title:  Scale of recording on paper 

message: According to Ansi AAMI standard (EC 11 standard (1991), "Diagnostic Electrocardiographic devices") the low-pass filter must be set at least at 150Hz for diagnostic purposes. (The American Heart Association recommends that diagnostic ECGs have a frequency response up to 150
Hz.)
This avoids significant distortion on QRS-T transients that arise when low pass cut-off frequency is lower (e.g 100 Hz).
Other editors suggests that "in diagnostic mode, the low pass filter can be set to 40, 100, or 150Hz;"
The second issue is probably true on specific devices but may be misleading since 150 Hz should be set on filter to avoid impact on interpretation.
Suggestions on this issues are welcomed  — Preceding unsigned comment added by Cbecc (talk • contribs) 13:32, 20 September 2013 (UTC)
thread_title:  Filters: low pass response  

message: In the "Waves and Intervals" section it seems to me that the explanation on the 'PR segment' may be wrong, it currently reads:
It has always been my understanding that during the PR segment the AV node is delaying transfer of the electrical signal from Atria to Ventricals, were the signal to be traveling down the Bundle of His that would be the very definition of electrical activity the ACG should (and does) detect, flat on ECG is no electrical activity, whether contractions happen or not can't be told from ECG alone (PEA is the perfect example for that). --Keeper of the Keys (talk) 00:28, 21 January 2015 (UTC)
thread_title:  Waves and Intervals -- PR segment 

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thread_title:  External links modified 

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thread_title: Assessment comment

message: The table in the "Electrodes and leads" section lists 10 electrodes, even though the sentence before the table reads: "The 12 leads in a 12-lead EKG are listed below". The meaning of "lead" is not defined well enough. Can an electrode have more that one lead? If so, what leads are missing from the table of electrodes? EditorAtLarge (talk) 09:54, 6 September 2016 (UTC)
thread_title:  Electrodes and leads 

message: The article contains the phrase "a conventional 109 ECG", with no explanation given. What does the number refer to?  is it part of a larger system of numericlature for procedures, or is it specific to ECGs?  I did a quick search but didn't find an answer.  MrRK (talk) 16:11, 7 September 2017 (UTC)
thread_title:  Significance of "109"? 

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thread_title:  External links modified 

message: Hello world! It's been a while since I've edited but here goes. I think the following section of the intro is not accurate and is covered better in the Theory section anyway. Here's my explanation, since this edit removes a substantial chunk I thought I should justify:
"It can also be further broken down into the following:
* O is the origin or datum point preceding the cycle (citation needed as this is not in common use)
* P is the atrial systole contraction pulse (not a great definition of P as it is usually a good idea to separate electrical and physical activity - not all electrical waves generate a systole... The standard accepted definition of P is already listed in the Theory section)
* Q is a downward deflection immediately preceding the ventricular contraction (no - it is more accurate to say that the QRS as a whole represents ventricular depolarisation. Technically, since ventricular contraction follows soon after the QRS complex the s wave might actually be the downward deflection immediately preceding ventricular contraction.)
* R is the peak of the ventricular contraction (again, not strictly true. R is a positive depolarisation wave and contraction occurs soon after (but not at the same time). Important to remember the ECG represents electrical activity and this electrical activity may not even generate a contraction at all times...)
* S is the downward deflection immediately after the ventricular contraction (inaccurate, see above)
* T is the recovery of the ventricles
* U is the successor of the T wave but it is small and not always observed"
In summary I have removed this section as it duplicates existing content in the Theory section and does not use standard accepted definitions / descriptions of these terms. It was also unreferenced.
Hope this is ok by more experienced editors!
Bron (talk) 20:28, 31 March 2019 (UTC)
thread_title:  Editing intro 

message: Can someone please explain what a capacitively coupled electrocardiogram, a conventional galvanic reference ECG and their differences in Capacitive ECG Monitoring in Cardiac Patients During Simulated Driving. are? --46.83.142.48 (talk) 15:56, 18 September 2019 (UTC)
thread_title:  rECG vs cECG 

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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for deletion 

message: Could not somebody add the normal values of the quantities PR, QRS, and QT or else I would. 
                                                                                           Ahmad 123456p (talk) 16:43, 29 January 2021 (UTC)
thread_title:  Addition of normal values of the quantities PR, QRS, and QT  

message: What is the interpretations of the down stroke in the EKG like the second half of the P wave? And what action of the electrical activity of the heart does it represents?  And the same I'm wondering with the T wave? Willing student (talk) 07:16, 22 December 2021 (UTC)
thread_title:  down stroke on the EKG 

message: Description of using of RL electrode for voltage calculation is must be at this article. Or the non-using of it must be indicated explicitly. Voproshatel (talk) 16:07, 7 October 2023 (UTC)
thread_title:  Description of using of RL electrode for voltage calculation is must be.