Describe Splitting of S2 ?
On inspiration: The split widens as both A, and Pi move away from each other with p, moving out more. The negative intrathoracic pressure during inspiration draws more blood from IVC and SVC into RA and RV. The increased RV volume delays pulmonary closure. Also the capacitance of pulmonary vascular creases during inspiration hence the pulmonary independence falls further, thereby delaying the P2 As LV becomes smaller with inspiration, pulmonary venous return decreased with increasing pulmonary vascular bed consequently A, occurs earlier.