Narrow Complex Tachycardias

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How to avoid misdiagnosis of irregular rhythms

A 80-year-old woman is referred to the emergency department for suspected rapid atrial fibrillation. The following ECG is obtained on arrival: 

Wolff-Parkinson-White (WPW) Syndrome with Supraventricular Tachycardia (SVT)

A 24-year-old man with past medical history of WPW syndrome s/p ablation presents to the emergency department with palpitations. On arrival, he is found to have a wide complex tachycardia…

Wide Complex Tachycardias: precordial concordance and what to do when some leads appear narrow and others appear wide

A 38-year-old man is brought to the emergency department by EMS for palpitations after he is found to be tachycardic. He is noted to be hypotensive with SBP of 70…

Wide Complex Tachycardias: beware the many mimics of ventricular tachycardia

HPI: A 73-year-old woman with PMHx of HTN, DM, HLD presents to the emergency department with 2 days of vomiting, malaise, and indigestion with chest discomfort. The following ECG is…

UMEM cases that will teach you how to differentiate narrow complex regular and irregular tachycardias, electrocardiographic polyuria (too many P waves) and so much more!

A 92-year-old man is brought to the emergency department by EMS with palpitations. The following ECG is obtained on arrival:

ECG cases to help you save lives and also crush your board exams

A 45-year-old woman is being observed in the emergency department after treatment with thrombolytics for MI. She is noted to be tachycardic one hour after treatment with a change in…

Narrow Complex Tachycardia: sinus tachycardia, atrial flutter, or SVT?

A 52-year-old man presents to the emergency department with palpitations and is found to be tachycardic. The following ECG is obtained on arrival:

EMS ECGs: regular and irregular narrow complex tachycardias, junctional rhythms, the ECG in LVAD patients, and more!

A 62-year-old man is found unresponsive at home. The following EMS ECG is obtained:

Differential Diagnoses: narrow complex irregular tachycardia, short QTc intervals, ST segment elevation in aVR, and so much more!

An 89-year-old woman is brought into the emergency department with generalized weakness and dizziness. She is noted to be bradycardic at triage. The following ECG is obtained with no prior…

Narrow Complex Tachycardia: the maximum achievable sinus heart rate

A 67-year-old woman is brought to the ED by EMS for palpitations. She is found to have a heart rate ~168. Vital signs are otherwise within normal limits aside from…

Differential Diagnoses: narrow complex regular tachycardias

A 64-year-old man presents with palpitations. The following ECG is obtained:

Narrow Complex Tachycardias: the importance of careful ECG interpretation after cardioversion for tachyarrhythmia

A 15-year-old girl presents is brought to the ED complaining of palpitations and near-syncope. She is found to be tachycardic on arrival and the following ECG is obtained:

The Bix rule in narrow complex tachycardia

A 63-year-old man is brought in by EMS to the ED with palpitations. The following prehospital ECG is obtained:

How to avoid misdiagnosing the most overcalled tachyarrhythmia by physicians and EGC machines

HPI:  A 64-year-old man presents to the ED with nausea and vomiting. He is tachycardic on arrival and the following ECG is obtained: Case ECG Before watching this week’s video,…

Differential Diagnoses: three main causes of narrow complex irregular tachycardias

HPI:  A 65-year-old male is brought to the ED with altered mental status. He seems confused and is found to be tachycardic and hypotensive (SBP=75). The following ECG is obtained…

EMS Cases: The definition of normal sinus rhythms and so much more!

A 89-year-old woman calls EMS for palpitations. The following ECG is obtained:

Narrow vs. wide complex QRS in patients with complete heart block

A 86-year-old woman presents to the ED with generalized weakness. The following ECG is obtained:

Differential Diagnoses: the main three things that cause narrow complex regular tachycardias

A 51-year-old man presents to the ED with generalized weakness and palpitations. The following prehospital ECG is obtained:

Narrow Complex Tachycardia: inappropriate anticoagulation because of misdiagnosis

A 96-year-old man presents to the ED with a dry skin rash. On review of symptoms the patient reports 1-2 episodes of fleeting chest pain that is sharp. The following…

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