JVP rises on deep inspiration is called as kussmaul's sign Mechanism: In normal body,During inspiration their is negative intrathoarcic pressurre & Increased intrathoracic volume,This will lead to increase in right hea capacity and the JVP falls with inspiration (Normal body) Whereas in ceain conditions, the hea is less compliant and a raise in venous return is seen, which will lead to raised JVP Kussmaul's sign is seen in where the right side of hea is not functioning properly Constrictive pericarditis -Right side of hea will not be functioning normally due to calcification. Restrictive cardiomyopathy - Right side of hea will not be functioning normally due to fibrosis. Complete Hea block causes CANON A waves Atrial fibrillation - Twitching Absent P wave in ECG; A wave absent in JVP | No rise of JVP in atrial fib