Bradycardia

Bradycardia is a rate that is slower than normal. In adults, a slow heart rate is usually under 60 beats per minute. At standard settings, this means there will be over 5 large grid squares between beats.

There are many causes of bradycardia, including rate-slowing medications, ischemia / infarction, hypothyroidism and sleep apnoea. In an older person, sick sinus syndrome is a frequent cause of inappropriate bradycardia.

See also: Rate

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References

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In the ECGquest archives, this ECG has been tagged with: - Cardiac arrest Bradycardia Irregular Peaked T waves Wide QRS Hyperkalemia 12-Lead Dr Smith's ECG Blog Dr Ken Grauer K. Wang CC BY-NC
A patient with cardiac arrest, ROSC, and right bundle branch block (RBBB).

This ECG is from a patient who presented after a PEA arrest with ROSC after intubation and chest compressions.

This ECG shows irregular, slow, wide complex rhythm with peaked T waves due to hyperkalemia.

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

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: - Bradycardia Vertical axis Inverted T waves Sinus bradycardia 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 28th January 2019 – Interpretation

This ECG is from a teenage girl who presented with ongoing weight loss (BMI 13) and a known eating disorder.

This ECG shows sinus bradycardia (36) and T wave inversion in V1-2 and aVL.

In the ECGquest archives, this ECG has been tagged with: - Hypotension Bradycardia Irregular Nonspecific baseline artefact Extra P waves Peaked T waves Wide QRS Second degree AV block Hyperkalemia 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
What will you do for this altered and bradycardic patient?

This ECG is from a woman in her 60s who presented from a nursing home with altered mental status, hypotension, hypoxia and bradycardia.

This ECG shows an irregular rhythm due to second degree AV block with wide QRS and peaked T waves. The cause was hyperkalemia.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Bradycardia Normal Axis Regular Inverted T waves 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 3rd December 2018 – Interpretation

This ECG is from a man in his 50s who had an episode of chest pain and shortness of breath. This ECG was recorded when he was pain free.

This ECG shows sinus bradycardia with T wave inversion in the inferior leads, which was caused by reperfusion of a critical stenosis of the RCA.

In the ECGquest archives, this ECG has been tagged with: - Bradycardia Wandering baseline Extra P waves Third degree AV block 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 12th November 2018 – Interpretation

This ECG is from a woman in her 70s who presented following a fall at home.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Bradycardia Left Axis Deviation Extra P waves Second degree AV block 2:1 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 29th October 2018 – Interpretation

This ECG is from a woman in her 80s who presented with intermittent chest pain and dyspnoea.

In the ECGquest archives, this ECG has been tagged with: - Bradycardia Irregular Normal Axis Absent P waves RSR' Wide QRS Atrial fibrillation 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 1st October 2018 – Interpretation

This ECG is from a man in his 80s who presented feeling generally unwell and nauseous, on a background of chronic atrial fibrillation, diabetes and hypertension.

In the ECGquest archives, this ECG has been tagged with: - Dizziness Bradycardia Normal Axis Regular Absent P waves Atrial fibrillation Junctional escape Third degree AV block 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 17th September 2018 – Interpretation

This ECG is from a woman in her 70s who complained of dizziness on a background of ischaemic heart disease, atrial fibrillation and diabetes.

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