This 61-year-old woman with known Adriamycin-induced cardiomyopathy as a result of treatment for lymphoma is in the ICU with severe heart failure that has required prolonged ventilation:

• Multifocal atrial tachycardia, rate 140/min
• One premature ventricular complex
• Left ventricular hypertrophy with QRS widening and repolarization abnormality