Figure 2.

Defining classes of myocardial infarction complications using principal tree–based clustering. The labeling marks either the cause of death (underscored for lethal outcome classes) or a set of complication variables strongly overrepresented in the cluster, according to the χ² test of independence; the size of the label reflects the significance of over-representation (the larger the label the more significant is the deviation from independence). A_V_BLOK: third-degree AV block; DRESSLER: Dressler syndrome; FIBR_JELUD: ventricular fibrillation; FIBR_PREDS: atrial fibrillation; JELUD_TAH: ventricular tachycardia; OTEK_LANC: pulmonary edema; P_IM_STEN: post-infarction angina; PREDS_TAH: supraventricular tachycardia; REC_IM: relapse of the myocardial infarction; ZSN: chronic heart failure.