This Viva will discuss the pharmacology and the physiology related to the pulmonary artery 
pressure. 
Q1. What is the normal pulmonary artery pressure, and which factors will increase the pulmonary 
artery pressure? 
Subsequent questions asked about factors that increase pulmonary artery pressure, drugs used 
to treat pulmonary hypertension and their mechanism of action, advantages of NO over other 
drugs, how pulmonary artery pressure may be measured at the bed side, how to determine 
Pulmonary Vascular Resistance.