<unk>  is contraindicated in a number of heart conditions: severe aortic stenosis, low blood pressure (systolic pressure under 100 mmHg), heart failure (NYHA class III–IV), prolonged QT time, severe bradycardia (slow heart rate), sinus node dysfunction, second or third-degree atrioventricular block, and acute coronary syndrome including heart attack.<unk>  and other intravenous rhythm control drugs (class I and class III antiarrhythmics) must not be given within four hours of each other.
Vernakalant
Bocasan
Atogepant
Tasimelteon
Seltorexant
Pulmocide
Veristrat
Bretylium