<prompt> Giant a waves in JVP occur in all except:Junctional rhythmPulmonary hypeensionTricuspid regurgitationComplete hea block  <response>: Answer is C Tricuspid Regurgitation Tricuspid stenosis not Tricuspid regurgitation is associated with large or a giant waves. a waves in JVP: Are positive waves, due to distension produced by Right atrial contraction. Large a waves indicate atrium is contracting against increased resistance. Large a waves : Tricuspid stenosis Pulmonary stenosis Pulmonary hypeension Cannon a waves : Regularly - During junctional rhythm Irregularly - Atrioventricular dissociation with ventricular tachycardia - Complete hea block Absent a waves : Atrial fibrillation 