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Evaluation of JVP

All About Cardiovascular System and Disorders

But in a VSD with pulmonary hypertension A wave is not prominent. It will not occur in the presence of a large VSD which equalizes both right ventricular and left ventricular pressures. One is ventricular tachycardia with regular retrograde activation. Second is junctional tachycarida. That can also cause regular cannon waves.