Open AccessThe relationship between the electrocardiographically estimated infarct size and 1 ‐ and 2‐year survival in acute myocardial infarction
Author(s) -
Herlitz J.,
Hjalmarson Å.
Publication year - 1985
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960080304
Subject(s) - medicine , myocardial infarction , quartile , cardiology , mortality rate , electrocardiography , infarction , t wave , confidence interval
In 587 patients with acute myocardial infarction (AMI) and no previous MI, electrocardiographically estimated infarct size was related to 1 ‐ and 2‐year mortality. The overall mortality was higher in patients with transmural MI (Q‐ or R‐wave changes in standard ECG) than in patients with subendocardial infarction (ST‐T‐wave changes in standard ECG) after 1 year (18.8% compared to 6.5% p<0.001) and after 2 years (22.2% compared to 13.8%, p=0.049). When patients who were alive during primary hospitalization were analyzed separately, slightly higher mortality was found in patients with transmural MI than in subendocardial MI after 1 year (9.6% compared to 4.2%, p =0.076) while no difference was found after 2 years (13.4% as compared to 11.7%, p>0.2). In a subgroup of patients with anterior MI, precordial mapping with 24 chest leads was analyzed 4 days after arrival in hospital (n=197). Patients were divided into quartiles according to the sum of R waves, the sum of Q waves, and the number of Q waves. There was a similar overall mortality in each quartile after 1 year and after 2 years regardless of ECG parameters studied. Neither did we find any correlation between the sum of R waves in leads II, III, and a VF on the fourth day in patients with inferior MI and overall 1 ‐ or 2‐year mortality rate, although there was a trend towards higher mortality with more ECG changes.