This ECG is of a 23 year old medical student who complained of an irregular heabeat. Other than an irregular pulse, his hea was clinically normal. What does the ECG show?

The ECG shows a hea rate of 100/min with normal axis. P wave and PR interval are in normal limits. Wide complex qRS is noted in lead II, III indicating Ventricular extra-systoles or premature ventricular contractions. ST segment and QT interval are within normal limits. In young and asymptomatic individuals extra-systoles do not indicate any significant hea disease.