case_images: PMC11825220_01
case_images: The ECG demonstrates a premature ventricular complex (PVC) occurring on the descending limb of the T wave, consistent with the R-on-T phenomenon.
case_images: cureus-0017-00000077403-i01.jpg
case_images: PMC11825220_01_cureus-0017-00000077403-i01.jpg
case_images: FIG1
case_images: Upon initial diagnostic assessment, he exhibited short-coupled PVCs on an ECG with an R-on-T phenomenon (Figures 1-2), with a normal QTc interval of 430 ms.
case_images: The ECG demonstrates a premature ventricular contraction (PVC) occurring on the descending limb of the T wave (R-on-T phenomenon). This triggers a polymorphic ventricular tachycardia consistent with torsades de pointes, characterized by twisting QRS complexes with varying amplitude and morphology.
case_images: cureus-0017-00000077403-i02.jpg
case_images: PMC11825220_01_cureus-0017-00000077403-i02.jpg
case_images: FIG2
case_images: Upon initial diagnostic assessment, he exhibited short-coupled PVCs on an ECG with an R-on-T phenomenon (Figures 1-2), with a normal QTc interval of 430 ms.
case_images: ECG demonstrates non-sustained polymorphic ventricular tachycardia (VT).
case_images: cureus-0017-00000077403-i03.jpg
case_images: PMC11825220_01_cureus-0017-00000077403-i03.jpg
case_images: FIG3
case_images: Cardiac monitoring revealed non-sustained episodes of TDP (Figure 3) alongside persistent ventricular ectopy (VEs) and episodes of VT (Figure 4) requiring direct current cardioversion (DCCV).
case_images: ECG demonstrates premature ventricular contraction (PVC) with R-on-T phenomenon leading to non-sustained ventricular tachycardia (VT) in the form of torsades de pointes.
case_images: cureus-0017-00000077403-i04.jpg
case_images: PMC11825220_01_cureus-0017-00000077403-i04.jpg
case_images: FIG4
case_images: Cardiac monitoring revealed non-sustained episodes of TDP (Figure 3) alongside persistent ventricular ectopy (VEs) and episodes of VT (Figure 4) requiring direct current cardioversion (DCCV).