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What conditions can cause sinus bradycardia?

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This is one type of bradycardia, when your resting heart beat is less than 60 beats a minute. It happens when your sinus node, sometimes called your heart’s natural pacemaker, doesn’t work right.

Conditions that can scar or injure your sinus node include:

  • Heart attack
  • Pericarditis, or inflammation of the thin tissues around the outside of the heart
  • A defect at birth
  • Sleep apnea, or when you briefly stop breathing while you sleep
  • A problem with your thyroid, the gland in your neck that helps control many of your body’s functions
  • Certain medications, including a class of medicines called beta blockers. You may take them to lower blood pressure or for other heart conditions.

From: What Are the Types of Bradycardia? WebMD Medical Reference

SOURCES:

Mount Sinai Hospital: “Bradycardia.”

Johns Hopkins Medicine: “Bradycardia.”

University Hospital Southampton, UK, “Bradyarrhythmias (slow heart rhythms).”

Saint Luke’s Health System: “Sinus Bradycardia.”

American Heart Association, “What Is Pericarditis?”

NIH, National Heart, Lung, and Blood Institute, “What Is Sleep Apnea?” “What is Heart Block?” “Types of Heart Block,” “What Causes Heart Block?” “How is Heart Block Treated?”

U.S. National Library of Medicine, “How does the thyroid work?”

Mayo Clinic: “Bradycardia: Treatments and Drugs,” “Sick sinus syndrome: Causes,” “Bradycardia: Causes.”

American Academy of Family Physicians: “Diagnosis and Treatment of Sick Sinus Syndrome.”

Reviewed by James Beckerman on August 02, 2018

SOURCES:

Mount Sinai Hospital: “Bradycardia.”

Johns Hopkins Medicine: “Bradycardia.”

University Hospital Southampton, UK, “Bradyarrhythmias (slow heart rhythms).”

Saint Luke’s Health System: “Sinus Bradycardia.”

American Heart Association, “What Is Pericarditis?”

NIH, National Heart, Lung, and Blood Institute, “What Is Sleep Apnea?” “What is Heart Block?” “Types of Heart Block,” “What Causes Heart Block?” “How is Heart Block Treated?”

U.S. National Library of Medicine, “How does the thyroid work?”

Mayo Clinic: “Bradycardia: Treatments and Drugs,” “Sick sinus syndrome: Causes,” “Bradycardia: Causes.”

American Academy of Family Physicians: “Diagnosis and Treatment of Sick Sinus Syndrome.”

Reviewed by James Beckerman on August 02, 2018

NEXT QUESTION:

What type of bradycardia is sick sinus syndrome?

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