Catheterization showed lesion-free coronary arteries, but the patient's incessant polymorphic ventricular tachycardia persisted. Magnesium, potassium, and amiodarone were administered, and a counterpulsation balloon was inserted; the patient progressively stabilized. The cardiac resynchronization therapy was optimized and biventricular pacing was achieved most of the time (Figure). After several days in cardiogenic shock, the vasopressors and counterpulsation balloon could be withdrawn, and the patient was extubated.

Figure

(0.38MB).