Arrhythmia
Results:
Bradycardia: DDx
Key Points Common Offenders: Beta-blockers, calcium channel blockers, and digoxin often top the list of medication-induced bradycardia. High Vagal Tone or AV Block can arise from structural heart disease, ischemia,…
Polymorphic Ventricular Tachycardia (PMVT)
Key Points Definition: PMVT is a ventricular tachycardia characterized by beat-to-beat variations in QRS morphology, axis, and duration, reflecting multiple ventricular foci or reentrant circuits. Clinical Importance: PMVT is often…
Nonsustained Ventricular Tachycardia
Key Points Definition: NSVT is defined as ≥3 consecutive ventricular beats, QRS duration >120 ms, rate typically 100-250 bpm (usually > 120 bpm), lasting less than 30 seconds without causing…
Ectopic Atrial Rhythm
Key Points Definition: Ectopic atrial rhythms occur when atrial depolarization originates from a site other than the sinoatrial (SA) node, producing P waves with abnormal morphology and axis on ECG….
Brugada Syndrome (BrS)
Key Points: Life-Threatening Sodium Channelopathy: Predisposes to ventricular arrhythmias (VF/VT) and sudden cardiac death (SCD), often in otherwise “healthy” hearts. When to Suspect BrS: Patients with syncope, unexplained “seizures,” ventricular…
Wide Complex Tachycardias: does response to Valsalva maneuvers or adenosine rule out ventricular tachycardia?
A 54-year-old man with no significant PMHx presents to the ED with palpitations. He is hemodynamically stable with a normal blood pressure. The following ECG is obtained prior to the…
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