Diabetes Care, Vol 3, Issue 4 526-529, Copyright © 1980 by American Diabetes Association
Clinical course of myocardial infarction among diabetic patients
A Czyzk, AS Krolewski, S Szablowska, A Alot and J Kopczynski
The clinical course of myocardial infarction (MI) was compared between 154
known diabetic (Ds) and nondiabetic (NDs) MI patients matched for age, sex,
and hospital ward. In both groups similar numbers of cases with cardiac
rupture, shock, pulmonary edema, and clinically observed arrhythmias were
found. In contrast, Ds patients had significantly more frequent A-V and
intraventricular conduction disorders than NDs (P less than 0.02). Ds also
died twice more often from MI (36%) than matched controls (18%). The excess
case fatality rates from MI among Ds were limited to the period between the
second and seventh day of hospitalization. The excessive fatality of Ds
from MI resulted mainly from the high liability of insulin-dependent
diabetic patients (IDDs), with the relative risk of over 4 in relation to
NDs. Ds with arrhythmias and/or conduction disorders had a particularly
poor prognosis for surviving, the relative risk exceeding 3. No ready
explanation of this phenomenon is presently available.