electrocardiogram: ventricular activation time (VAT) greater than 0.9 seconds in leads V4, V5, and V6
electrocardiogram: ventricular activation time (vat) greater than 0.9 seconds in leads v4, v5, and v6
VAT greater than 0.9 second in leads V4-6
vat greater than 0.9 second in leads v4-6