Previous angina reduces in-hospital death in patients with acute myocardial infarction.
There is little information on how previous angina influences in-hospital deaths secondary to acute myocardial infarction (MI). This study evaluated the causes of in-hospital deaths in MI patients with and without previous angina. A total of 2,264 consecutive patients were admitted to our hospital due to acute MI. These patients were divided into 2 groups according to the presence or absence of prior MI. Both groups were further divided according to the presence or absence of previous angina. The causes of in-hospital deaths were classified into 4 categories: (1) cardiogenic shock or congestive heart failure, (2) cardiac rupture, (3) arrhythmia, and (4) other causes. In patients with a first MI, the in-hospital mortality rate was lower in patients with previous angina than those without (6.9% vs 11.4%, p <0.01). There was no significant difference between these patients with and without previous angina in in-hospital deaths due to cardiogenic shock or congestive heart failure, arrhythmia, or other causes. Death due to cardiac rupture was less frequent in patients with previous angina (1.4% vs 5.0%, p <0.01). In patients with prior MI, the in-hospital mortality rate was lower in patients with than without previous angina (17.7% vs 25.3%, p <0.05). In contrast to patients with their first MI, there was a trend toward a lower incidence of in-hospital death due to cardiogenic shock or congestive heart failure in patients with previous angina (12.8% vs 19.0%, p = 0.05). There were no significant differences in in-hospital deaths due to cardiac rupture, arrhythmia, and other causes between the 2 subgroups. In multivariate analysis, previous angina was an independent predictor of in-hospital death. Thus, in-hospital deaths after acute MI in patients with previous angina were less because of less cardiac rupture in patients with a first MI and less cardiogenic shock or congestive heart failure in patients with prior MI.
Kobayashi
Y
Y
Department of Internal Medicine, National Cardiovascular Center, Suita, Osaka, Japan.
Miyazaki
S
S
Itoh
A
A
Daikoku
S
S
Morii
I
I
Matsumoto
T
T
Goto
Y
Y
Nonogi
H
H
D000368:Aged; D000787:Angina Pectoris / Q000150:complications / Q000175:diagnosis / Q000401:mortality*; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000209:etiology / Q000401:mortality; D017023:Coronary Angiography; D004562:Electrocardiography; D005260:Female; D006333:Heart Failure / Q000175:diagnosis / Q000209:etiology / Q000401:mortality; D006341:Heart Rupture / Q000175:diagnosis / Q000209:etiology / Q000401:mortality; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009203:Myocardial Infarction / Q000150:complications / Q000175:diagnosis / Q000401:mortality*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012770:Shock, Cardiogenic / Q000175:diagnosis / Q000209:etiology / Q000401:mortality