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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
'a' wave in JVP Indicates
assistant
The correct answer is  (a) Right atrial contractionRef: Harrison, 18th ed.,pg. 1823, fig. 227-1Graph of height of JVP with timeThe upward deflections are the"a" atrial contraction"c" ventricular contraction and resulting bulging of tricuspid into the right atrium during isovolumetric systole)"v" = venous fillingThe downward deflections of the wave are the"x" the atrium relaxes, and the tricuspid valve moves downwardthe "y" descent filling of ventricle after tricuspid opening.