Administration of intravenous calcium thought to be contraindicated in patients with digitalis toxicity based on 1936 case report
It was theorized in case report that calcium may cause an irreversible non-contractile state by impairing diastolic relaxation from calcium-troponin C binding in the presence of Na/K channel blockade by Digoxin
Excess calcium may also predispose to arrhythmias by adversely affecting re-polarization
Stone heart
Innocent pediatric murmurs
Atrio-esophageal fistula
Tricuspid atresia
Hypoplastic left heart syndrome
Ebstein anomaly
Ventricular septal defect
Left ventricular hypertrophy