… , except in the presence of a functioning pacemaker. Diltiazem is also contraindicated in left ventricular failure with pulmonary stasis as diltiazem may have mild negative effects on contractility.
Diltiazem is contraindicated in acute complicated myocardial infarction (e.g. bradycardia hypotension, congestive heart failure/reduced LV function), pulmonary congestion, hypotension (<90 mmHg systolic) cerebrovascular accident, cardiac shock and unstable angina pectoris.
Diltiazem is contraindicated in pre-excitation syndrome (e.g. WPW) accompanied with atrial flutter, fibrillation and in digitalis intoxication, as diltiazem may precipitate ventricular tachycardia.
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