Canadian Cardiovascular Society functional classification

(redirected from Class I)

Canadian Cardiovascular Society functional classification

Cardiology A system used to stratify the severity of angina pectoris. See APSAC. Cf New York Heart Association classification.
Canadian Cardiovascular Society–functional classification severity of unstable angina
Class I
Usual physical activity, eg walking or climbing stairs, does not cause angina; angina is evoked by strenuous and/or rapid work or recreation
Class II
Slight limitation of ordinary activities, eg after walking 2 blocks, climbing one flight of steps, under normal circumstances, after meals, in the cold, wind, in the morning, or when under emotional stress
Class III
Marked limitation of ordinary activities, eg walking 1-2 blocks or climbing stairs under normal circumstances
Class IV
Inability to carry out any physical activity without discomfort–angina may be present at rest
.
Circulation 1976, 54:522; JAMA, 1999; 281:1258-1260
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
BNSF, Canadian Pacific, Amtrak Class I's, Amtrak conduct "Officer on the Train" event in N.D..
Union Pacific recently released its 2012 Sustainability and Citizenship Report, which highlights the Class I's accomplishments in several areas such as safety, civic improvement, and employee welfare.
BNSF's newly opened economic development office in Bismarck, N.D., is expected to strengthen the Class I's relations with the state and support industrial growth, according to BNSF.
As one of two Class i eastern US railroads, CSX's access to import-export traffic at ports along the eastern seaboard and the Gulf Coast is essential to serve the local and inland population.
The report added that the $5 billion cumulative PTC investment required by Class I railroads equals what Class I's have doled out over the last four years, coupled with them having to spend hundreds of millions of dollars per year to maintain the PTC system.
Many were established only through substantial assistance from the Class I's, which then promoted them because they were the sources of carloads of potentially highly remunerative freight such as plastic resin, forest products, and chemicals.
The class shares are expected to reflect a 4.5 percent rise in Class I's overall taxes.
Denise Faustman of Massachusetts General Hospital in Boston and her colleagues now suggest that the disease might instead be associated with MHC class I proteins, which normally help the immune system discriminate between healthy body cells and those that are precancerous or infected by viruses.
Canadian National recently ordered four liquefied natural gas tenders from Westport Innovations to expand the Class I's environmental initiatives, according to the railroad.
Rail-trade groups voice concerns on deadline for PTC implementation The Association of American Railroads is one of several industry groups that voiced concerns over "barriers" -- including interoperability negotiations with Class I's -- to the implementation of positive train control before the end of 2015, writes Julie Sneider.