Change in rhythm

A change in rhythm can be either abrupt (e.g. sudden onset SVT) or gradual (e.g. slowing of rate between sinus tachycardia and normal sinus rhythm).ie pause after tachyarrhythmia before resuming sinus rhythm, may be more dangerous than the arrhythmia itself, ie sick sinus syndromeeg transient PR prolongation after retrograde impulse from PVC, or RP interval with 2 alternative AV nodal pathways…

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In the ECGquest archives, this ECG has been tagged with: - Loss of consciousness Seizure 12-Lead Irregular Narrow QRS Wide QRS Atrial fibrillation Change in rhythm Dr Smith's ECG Blog CC BY-NC
What is this tachycardia that alternates from wide to narrow to wide? 30426

This ECG is from a patient in their 50s who presented unconscious and tachycardic after a seizure.

This ECG shows alternating wide and narrow complex tachycardias at the same rate, likely due to aberrancy.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Tachycardia Wide QRS Change in rhythm Wide complex tachycardia Bifascicular block LAFB RBBB Positive Sgarbossa criteria Dr Smith's ECG Blog CC BY-NC
What is this rhythm? And what else does it show? 30008

This ECG is from a man in his 60s who presented with abdominal pain dyspnoea and altered level of consciousness, in shock.

This ECG shows wide complex tachycardia with concordant ST elevation in V4-6, due to LAD occlusion. The rhythm was likely sinus tachycardia with RBBB and then LAFB mid way through the trace.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Change in rhythm ICD Overdrive Pacing Ventricular tachycardia ECG of the Week CC-BY-NC-SA
ECG of the Week – 4th February 2019 – Interpretation 29573

This ECG is from a man in his 70s who presented after a shock delivery from his AICD.

This ECG shows a run of VT terminated by anti-tachycardia pacing but followed by recurrent VT.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Absent P waves Bradycardia Hidden P waves Irregular Narrow QRS Normal Axis Short PR Change in rhythm Junctional escape Multiple rhythms Sinus arrhythmia Sinus bradycardia Dr Smith's ECG Blog CC BY-NC
What is the Rhythm? 29505

This ECG is from a young man who presented shortly after a 45 min episode of palpitations, shortness of breath, chest pressure and presyncope. He was an athlete.

This ECG shows marked sinus bradycardia with AV dissociation by default (not AV block) with junctional escape beats.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Rhythm Strip Bigeminy Change in rhythm Ventricular Fibrillation Dr Smith's ECG Blog CC BY-NC
Posterolateral OMI resulting in VT, then R-on-T phenomenon and VF – change of rhythm 27579

This ECG is from a man in his 50s who presented with 1 hour of chest pain and shortness of breath. This was his repeat ECG while preparing for transport to the cath lab.

In the ECGquest archives, this ECG has been tagged with: - Dizziness 12-Lead Change in rhythm Ventricular tachycardia Wide complex tachycardia ECG Interpretation CC-BY-NC-SA
ECG Blog #151 (WCT – VT – SVT – AV Dissociation – Ashman) 19311
In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Serial 12-lead Flutter P waves Narrow QRS Regular Tachycardia Atrial flutter Change in rhythm Dr Smith's ECG Blog CC BY-NC
Inferolateral ST elevation, vomiting, and elevated troponin – repeat ECG 2, with vomit 17105
In the ECGquest archives, this ECG has been tagged with: - Vomiting 12-Lead Serial 12-lead Flutter P waves Irregular Narrow QRS Tachycardia Atrial flutter Change in rhythm Dr Smith's ECG Blog CC BY-NC
Inferolateral ST elevation, vomiting, and elevated troponin – repeat on diltiazem drip 17108
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