ECG Quest > Rhythms > Sinus Rhythms > Sinus bradycardia

Sinus bradycardia

Sinus bradycardia is a regular, slow (<60 bpm) rhythm that originates in the SA node and has a normal P wave and PR interval. It has many different causes, including medication, ischemia, hypothermia or hypothyroidism. It can be normal in trained athletes to have a resting heart rate less than 60 bpm.

See also: Sinus Rhythms

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References

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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: - Chest pain Bradycardia Left Axis Deviation Sinus bradycardia 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This ECG was taken after aspirin just as he had significant relief from the pain.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Hyperacute T waves Sinus bradycardia Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – second ECG, as pain returned 40 min later

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG 40 min after arrival, when pain returned.

In the ECGquest archives, this ECG has been tagged with: - Left Axis Deviation Biphasic T waves Sinus bradycardia Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – post-intervention ECG

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG post-intervention.

In the ECGquest archives, this ECG has been tagged with: - Left Axis Deviation Biphasic T waves Sinus bradycardia 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Anterior ST elevation Hyperacute T waves Sinus bradycardia Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – second repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Sinus bradycardia Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – third repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after some improvement.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Left Axis Deviation Nonspecific baseline artefact Anterior ST elevation Hyperacute T waves Sinus bradycardia Acute Anterior MI 12-Lead Serial 12-lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
A Tale of 2 Occlusions in the Same Patient: one with Expert ECG interpretation, the Other Without – fourth repeat ECG on day 2

This ECG is from a man in his 40s who presented with chest discomfort and diaphoresis since waking a few hours earlier, on a background of prior infarction with PCI years ago, active smoking, high cholesterol and hypertension. This was the repeat ECG on day 2, after pain returned with nausea and diaphoresis that was exactly like his initial pain.