[en] Nowadays the amount of people who die because of cardiac arrest is significantly higher than others like the ones related to traffic accidents or fires, even if these have more relevancy in the media but it's repercussion is way lower. This must be matter of concern because a good training of the population in rescuing and first aid would be very important for reducing some of these deaths. Resuscitation guidelines were founded with the objective of going forward on the research. These guidelines summarize the advances made in the field of cardiac arrest and take them as a baseline to recommend an actuation protocol for high-risk situations. Resuscitation guidelines, published every 5 years, base their development in the deep research of 3 main parameters taking part during the compressions delivered during heart massage: depth, rate and compression/decompression time/total cycle time relation. These 3 parameters define the quality of the cardiopulmonary resuscitation, and this is why researches have focused on the analysis of their behaviour in order to improve the performance of the emergency equipment. Nevertheless, recently the existence of a new independent parameter has been proposed. This parameter, chest decompression velocity, would be an important source in order to assess the quality of compressions. Zoll Medical Corporation company in collaboration with many other partners has recently published a research concluding that, even though if there is not a strong evidence to say this new parameter is relevant, it can be a new way to research. The main question is if this parameter actually is an independent parameter from the traditional ones or if it's somehow related with any of them, and therefore it does not have as much information as it seemed. In this context this document develops the observational study performed over a previously recorded database, focusing on the analysis of the variable of velocity of the chest release. A specifically developed tool allows the characterization of each of the compressions of the database, extracting its main parameters for their observational analysis. Extracted conclusions will not be only a scientific progress for themselves, but in positive case they will also open a new way of research in relation to this new parameter.

[eu] Gaur egun bihotz-biriketako geldialdiaren eraginez gertatutako heriotzak mediatikoagoak diren beste batzuk baino gehiago dira, hala nola suteen edota trafiko istripuen eraginez gertatutakoak, eta hala ere bere oihartzuna askoz txikiagoa da. Jazoera hau larritzeko arrazoia izan behar da, izan ere bihotz-biriketako berpiztearen inguruko populazioaren hezkuntza zuzen batekin, heriotza hauetako asko ekidin ahal izango ziren. Bihotz-biriketako berpiztearen arloko ikerketan aurrera egiteko berpizte gidak sortu ziren, egindako aurrerapenak biltzen eta horietan oinarrituta kasu kritikoetarako jarraibidea finkatzen dutelarik. 5 urtero argitaratutako berpizte gidak bere garapena berpiztean egindako konpresioetan parte hartzen duten 3 parametro nagusietan oinarritzen dute: sakonera, frekuentzia eta konpresio/deskonpresio denbora eta ziklo osoaren denboraren arteko erlazioa. 3 parametro hauek bihotz-biriketako berpiztearen kalitatea definitzen dute, horregatik orain arte ikerketak bere portaera aztertzean zentratu dira emergentzia taldeen erantzuna hobetzeko asmoz. Hala ere duela gutxi konpresioen kalitatea aztertzeko garrantzitsua izan daitekeen parametro independente berri baten existentzia proposatu da: bularraren deskonpresio abiadura. Zoll Medical Corporation konpainiak beste partner batzuen laguntzarekin ikerketa bat argitaratu berri du non parametro berriaren garrantzia baieztatu ezin duen arren, bai ireki egiten du ikerketa bide bat horren inguruan. Galdera nagusia hurrengoa da: parametro hau berez beste parametro tradizionalekiko parametro independente bat da edo nolabaiteko erlazioa dauka horietako batekin/batzuekin eta berez, ez du pentsatu bezain besteko informazioa? Testuinguru honetan dokumentu honek aurretik grabatutako erregistro base batetan oinarritutako behaketa ikerketa garatzen du, non abiadura aldagaiaren analisian zentratzen da. Espreski proiektu honetarako garatutako erreminta batek banan-banan erregistro-basean dauden konpresio guztiak karakterizatzea ahalbidetzen du, bere parametro garrantzitsuenak identifikatuz ondoren horien gainean behaketa analisia egiteko. Ateratako ondorioak ez dira berez garapen zientifiko bat bakarrik izango, izan ere positiboak izanez gero parametro berri honen inguruan ikerketa bide berri bat irekiko dute.