PMC9763442_01
Admission electrocardiogram (ECG) and acute myocardial infarction (AMI) ECG. (A) ECG on admission. It showed a sinus rhythm at 76 bpm (beats per minute), normal conduction, and low amplitude of T wave in multiple leads. (B) ECG during AMI. It showed ST segment elevation in leads II, III, and aVF and ST segment depression in leads I, aVL, and v4-6.
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F1
ST segment elevation in leads II, III, and aVF and ST segment depression in leads I, aVL, and V4-6 (Figure 1). She was diagnosed as having
Coronary angiography. (A) Before thrombus aspiration, a large filling defect remained due to an extensive thrombus in the proximal left circumflex (LCX) with The Thrombolysis In Myocardial Infarction (TIMI) grade 2 flow. (B) After thrombus aspiration, the large filling defect appeared. And the TIMI grade of LCX improved. (C) A large thrombus was presented after thrombus aspiration. (D) Atrial and ventricular leads of dual-chamber pacemaker were normal. No leads' dislodgement or fracture was found.
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TIMI grade 2 flow (Figure 2).
Monitoring electrocardiogram (ECG) at lead II. It was found that the pacemaker gradually lost capture before the patient lost consciousness (A-C). Ventricular pacing spikes are shown in a red arrow.
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F3
Looking back at the ECG monitor, ventricular pacing spikes were visible and failed to capture the myocardium (Figure 3).