Figure 1
From: Verapamil-associated cardiogenic shock in a 71-year-old man with myasthenia gravis: a case report
(A) 12-lead electrocardiogram in the Myasthenia Gravis patient two hours after the first dose of verapamil SR 240 mg and just a few minutes before cardiogenic shock. Spectacular widening of the QRS at 230 msec is observed (paper speed: 25 mm/sec). (B) 12-lead electrocardiogram in the Myasthenia Gravis patient in the intensive care unit two hours after verapamil withdrawal and intravenous administration of calcium chloride and glucagon. Significant hemodynamic improvement was already observed. QRS narrowing at 138 msec was also seen (paper speed: 25 mm/sec).