Giant 'a' waves in JVP occur in all except:
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
Junctional rhythm
Pulmonary hypeension
Tricuspid regurgitation
Complete hea block