case_images: PMC9334073_01
case_images: Initial ECG of a 58-year-old man in our hospital. This ECG reveals ST elevations in leads V1-V6 and reciprocal changes in leads II, III, and aVF. ECG: electrocardiogram.
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case_images: fig1
case_images: The initial electrocardiogram (ECG) revealed ST elevations in leads V1-V6 and reciprocal changes in leads II, III, and aVF (Figure 1).
case_images: On the fourth day of hospital discharge, the ECG reveals no significant QT prolongation.
case_images: CRIC2022-4505964.002.jpg
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case_images: fig2
case_images: The ECG revealed no significant QT prolongation (Figure 2).
case_images: A second ECG taken after ROSC following cardiopulmonary arrest. ECG shows QT prolongation. ECG: electrocardiogram; ROSC: return of spontaneous circulation.
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case_images: fig3
case_images: However, ECG showed QT prolongation (Figure 3).
case_images: Polymorphic VT, (a) which starts in a pause-dependent manner with a long-short sequence and (b) is observed frequently after ROSC. Hence, the initial diagnosis is TdP following an MI. VT: ventricular tachycardia; ROSC: return of spontaneous circulation; TdP: torsades de pointes; MI: myocardial infarction.
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case_images: fig4
case_images: Polymorphic VT, which started in a pause-dependent manner with a long-short sequence, was observed frequently (Figures 4(a) and 4(b)).
case_images: Repeat ECG following discontinuation of ticagrelor. There is shortening of the previously prolonged QT interval. ECG two days after ticagrelor discontinuation. No further cardiac events are sustained in the follow-up period. ECG: electrocardiogram.
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case_images: fig5
case_images: Subsequently, the QT interval was shortened, and no further TdP occurred (Figure 5).