Title: New York Heart Association Functional Classification
Content:  The New York Heart Association (NYHA) Functional Classification provides a simple way of classifying the extent of heart failure. It places patients in one of four categories based on how much they are limited during physical activity; the limitations/symptoms are in regard to normal breathing and varying degrees in shortness of breath and/or angina. It originated in 1928, when no measurements of cardiac function were possible, to provide a common language for physicians to communicate. Despite difficulties in applying it, such as the challenge of consistently classifying patients in class II or III, because functional capacity is such a powerful determinant of outcome it remains arguably the most important prognostic marker in routine clinical use in heart failure today. With time the classification system evolved and updated multiple times. Presently, the ninth edition of the NYHA classification is being used in the clinical practice released in the year 1994 by the Criteria Committee of the American Heart Association, New York City Affiliate. Another frequently used functional classification of cardiovascular disease is the Canadian Cardiovascular Society grading of angina pectoris.
Title: Canadian Cardiovascular Society
Content: Class I – Angina only during strenuous or prolonged physical activity ; Class II – Slight limitation, with angina only during vigorous physical activity ; Class III – Symptoms with everyday living activities, i.e., moderate limitation ; Class IV – Inability to perform any activity without angina or angina at rest, i.e., severe limitation The Canadian Cardiovascular Society Angina Grading Scale is commonly used for the classification of severity of angina: It is similar to the New York Heart Association Functional Classification of heart failure.
Title: Canadian Cardiovascular Society grading of angina pectoris
Content:  (Note: Class 0 is not an official part of the CCS functional classification of angina pectoris, however it has been mentioned in several sources, referring to myocardial ischemia without symptoms.)
Title: Canadian Cardiovascular Society grading of angina pectoris
Content:  and surgical therapy by comparing the patient’s status before and after therapeutic interventions. It was expected that a four-grade instead of a three-grade system would result in a greater discriminative power that would ensure better reproducibility. The grading scale was derived and modelled using some criteria from the New York Heart Association Functional Classification and the American Medical Association classes of organic heart diseases. The severity of angina on exertion was categorised by independent observers who detailed threshold activities for each level and noted the changes over time (different stages of angina pectoris are based on the level of difficulties patients have with carrying out ordinary activities; ordinary activities includes walking and climbing the stairs).
Title: Canadian Cardiovascular Society grading of angina pectoris
Content:  The Canadian Cardiovascular Society grading of angina pectoris (sometimes referred to as the CCS Angina Grading Scale or the CCS Functional Classification of Angina) is a classification system used to grade the severity of exertional angina.
Title: Heart failure
Content:  any physical activity. This score documents the severity of symptoms and can be used to assess response to treatment. While its use is widespread, the NYHA score is not very reproducible and does not reliably predict the walking distance or exercise tolerance on formal testing. In its 2001 guidelines, the American College of Cardiology/American Heart Association working group introduced four stages of heart failure: The ACC staging system is useful since stage A encompasses "pre-heart failure" – a stage where intervention with treatment can presumably prevent progression to overt symptoms. ACC stage A does not have a corresponding NYHA class. ACC stage B would correspond to NYHA class I. ACC stage C corresponds to NYHA class II and III, while ACC stage D overlaps with NYHA class IV.
Title: Angina
Content:  Cardiac syndrome X, sometimes known as microvascular angina is characterized by angina-like chest pain, in the context of normal epicardial coronary arteries (the largest vessels on the surface of the heart, prior to significant branching) on angiography. The original definition of cardiac syndrome X also mandated that ischemic changes on exercise (despite normal coronary arteries) were displayed, as shown on cardiac stress tests. The primary cause of cardiac syndrome X is unknown, but factors apparently involved are endothelial dysfunction and reduced flow (perhaps due to spasm) in the tiny "resistance" blood vessels of the heart. Since microvascular angina is not characterized by major arterial blockages, it is harder to recognize and diagnose. Microvascular angina was previously considered a rather benign condition, but more recent data has changed this attitude. Studies, including the Women's Ischemia Syndrome Evaluation (WISE), suggest that microvascular angina is part of the pathophysiology of ischemic heart disease, perhaps explaining the higher rates of angina in women than in men, as well as their predilection towards ischemia and acute coronary syndromes in the absence of obstructive coronary artery disease.
Title: Unstable angina
Content:  Unstable angina (UA), also called crescendo angina, is a type of angina pectoris that is irregular. It is also classified as a type of acute coronary syndrome (ACS). It can be difficult to distinguish unstable angina from non-ST elevation (non-Q wave) myocardial infarction (NSTEMI). They differ primarily in whether the ischemia is severe enough to cause sufficient damage to the heart's muscular cells to release detectable quantities of a marker of injury (typically troponin T or troponin I). Unstable angina is considered to be present in patients with ischemic symptoms suggestive of an ACS and no elevation in troponin, with or without ECG changes indicative of ischemia (e.g., ST segment depression or transient elevation or new T wave inversion). Since an elevation in troponin may not be detectable for up to 12 hours after presentation, UA and NSTEMI are frequently indistinguishable at initial evaluation.
Title: Anginal equivalent
Content:  An anginal equivalent is a symptom such as shortness of breath (dyspnea), diaphoresis (sweating), extreme fatigue, or pain at a site other than the chest, occurring in a patient at high cardiac risk. Anginal equivalents are considered to be symptoms of myocardial ischemia. Anginal equivalents are considered to have the same importance as angina pectoris in patients presenting with elevation of cardiac enzymes or certain EKG changes which are diagnostic of myocardial ischemia.
Title: Renal angina
Content:  8 (>15% FO or eCCl decrease of > 50%). The composite range of the RAI is therefore: 1, 2, 3, 4, 5, 6, 8, 10, 12, 20, 24, and 40. Patients who fulfill features of both the risk stratification and the associated threshold for clinical signs of kidney dysfunction are akin to the cardiac angina paradigm to guide troponin assessment. For instance, troponin would not be expected to function well for prediction of myocardial ischemia in an otherwise healthy 25-year-old that experienced chest pain after eating a fatty meal. Likewise, a troponin should not be drawn on every 85-year-old seen in an emergency room irrespective of the presence of chest pain just because myocardial infarctions are more prevalent in older individuals. 

Question: new york heart association functional classification of angina?
Answer: II.