What is the abnormality shown in the ECG?
The ECG shows presence of PVC- premature ventricular contractions which increase the risk of development of ventricular tachycardia due to R on T phenomenon. PVCs (bigeminal or trigeminal pattern) occurs due to electrolyte abnormalities (especially hypokalemia or hyperkalemia and hypomagnesemia), hypehyroidism, and occult hea diseases. VT or VF may occur due to the precipitation of a PVC just prior to the peak of the T wave on ECG.
Premature ventricular contractions
Sine wave pattern
ST segment depression
Electrical alternans
ECG and Arrhythmias 1