Fig. 3
From: Electrocardiograms for cardiomyopathy risk stratification in children with anthracycline exposure
Kaplan-Meier estimates show the probability for patients to remain “cardiomyopathy-free” over time. There is a lower chance of cardiomyopathy-free survival for QTc ≥ 440 ms (“high”) and ΣQRS(6 L) ≤ 3.2 mV (“low”) over time. Time “zero” for column a (n=480) is the electrocardiogram (ECG) preceding echocardiographic evidence of cardiomyopathy and for column b (n=303) is the last anthracycline treatment dose. The patients in column b are the subset from column a who had completed chemotherapy at the time of ECG analysis