Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
†ECG abnormalities: overt tachycardia (>110/min), supraventricular arrhythmia, second‐ or third‐degree atrioventricular block, left, right, extreme or indeterminate axis, pathological Q‐waves or high R‐waves V1/V2, low QRS voltages, T‐wave abnormalities, very long or very short QTc, suspicion of cardiomyopathy or other overt ECG abnormalities (eg, dextrocardia).
