PMC8084386_01
Coronary angiogram demonstrating angiographic intermediate stenosis of the proximal left anterior descending artery.
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The patient was referred for coronary angiography, demonstrating angiographic intermediate stenosis in the proximal segment of the intermediate artery (IA) and left anterior descending artery (LAD) (Fig. 1).
Fractional flow reserve (FFR) console screenshot demonstrating FFR values measured in the intermediate artery (0.97) and left anterior descending artery (0.84).
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Fractional flow reserve (FFR) measurement using adenosine (240 mug, volume 20 mL) was performed in the IA as well as LAD, both measures were negative, respectively 0.97 and 0.84 (Fig. 2). Following immediate intracoronary (IC) adenosine administration in the LAD the patient developed torsades de pointes (TdP) with circulatory collapse (Fig. 2).
Electrocardiogram and arterial pressure following immediate intra-coronary adenosine administration for fractional flow reserve measurement of the left anterior descending artery, leading to torsades de pointes, with spontaneous self-termination.
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Intra-procedural electrocardiogram revealed supraventricular extra-systoles with short coupling at the time of adenosine injection, preceding the onset of TdP (Fig. 3).