case_images: PMC9125101_01
case_images: Admission electrocardiogram demonstrating high-grade block with atrioventricular dissociation and an infrahisian escape rhythm with a right bundle branch and left anterior fascicular pattern (corrected QT interval: 480 milliseconds).. Abbreviation: VF, ventricular fibrillation.
case_images: 10.1177_23247096221098333-fig1.jpg
case_images: PMC9125101_01_10.1177_23247096221098333-fig1.jpg
case_images: fig1-23247096221098333
case_images: His admission ECG demonstrated AV block with an infrahisian escape rhythm with a right bundle branch and left anterior fascicular pattern suggesting a left posterior fascicular origin of escape (Figure 1).
case_images: Representative electrocardiographic tracing from continuous cardiac monitoring demonstrating pause-dependent polymorphic ventricular tachycardia in the setting of high-grade atrioventricular block.
case_images: 10.1177_23247096221098333-fig2.jpg
case_images: PMC9125101_01_10.1177_23247096221098333-fig2.jpg
case_images: fig2-23247096221098333
case_images: Upon arrival to the MICU, his rhythm quickly degenerated into polymorphic ventricular tachycardia leading to cardiac arrest (Figure 2).
case_images: Postarrest electrocardiogram demonstrating high-grade atrioventricular block and short-coupled R-on-T premature ventricular contractions triggering non-sustained polymorphic ventricular tachycardia.. Abbreviation: VF, ventricular fibrillation.
case_images: 10.1177_23247096221098333-fig3.jpg
case_images: PMC9125101_01_10.1177_23247096221098333-fig3.jpg
case_images: fig3-23247096221098333
case_images: In the immediate post-resuscitation period, his rhythm continued to demonstrate high-grade AV block and short-coupled R-on-T premature ventricular contractions triggering non-sustained polymorphic ventricular tachycardia (Figure 3).