Physiological antagonist of aldosterone – MCQ

Which of the following acts as a physiological antagonist of aldosterone in heart failure?

a) Endothelin 1
b) Antidiuretic hormone
c) Atrial natriuretic peptide
d) All of the above

Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal