PMC7669524_01
The patient's electrocardiogram indicates a wide complex tachycardia (WCT) and atrioventricular dissociation suggestive of ventricular tachycardia. The black arrows indicated the prolonged QRS duration, intrinsicoid deflection, and the red lines underscore the regular WCT.
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A 12-lead electrocardiogram (ECG) revealed ventricular tachycardia with atrioventricular dissociation and QRS concordance (see Figure 1).
The patient's cardiac computed tomography angiography cross-sectional view illustrating the absence of the left main coronary artery (encircled in red) with the retrograde opacified left anterior descending (LAD), circumflex arteries (LCx) with their sub-branches, diagonal (D) and obtuse marginal (OM) (labeled).
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A cardiac computed tomography angiogram (CCTA) was performed to assess the occluded LMCA and also revealed mild luminal irregularities of the other coronary arteries and a calcium score of zero (see Figure 2).
The patient's cardiac magnetic resonance angiography short-axis view displaying spontaneous echo contrast (encircled in red) suggestive of the depressed left ventricular function.
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Cardiac magnetic resonance imaging (cMRI) affirmed the bedside transthoracic findings and suggested myocardial viability (see Figure 3).