Most common cardiac adverse effect of lithium is?
Reference: Katzung, Basic & Clinical Pharmacology, 13th ed., Pg. 748.
The bradycardia-tachycardia (“sick sinus”) syndrome is a definite contraindication to the use of lithium because the ion further depresses the sinus node. T-wave flattening is often observed on the electrocardiogram but is of questionable significance.
Arrythmia
Cardiomyopathy
Bradycardia
Hypotension