02/05/2026
Could your fainting spells be a sign of Bradycardia?
Many people assume that fainting (syncope) is just a result of low blood pressure or fatigue. However, it is often caused by bradycardia—a condition where the heart beats too slowly, preventing the brain from receiving enough oxygen.
Which rhythm and conduction disorders are most likely to cause a blackout?
1. Sinus Bradycardia
This is a heart rate below 60 beats per minute (BPM). When the pulse drops to a critical level below 30–40 BPM, the heart cannot pump enough blood to the brain, leading to sudden dizziness or fainting.
2. Sick Sinus Syndrome (SSS)
When the heart’s "natural pacemaker" malfunctions, it can cause long pauses in the heartbeat or a dangerous alternation between too slow and too fast rhythms. These pauses (lasting several seconds) are the most common cause of loss of consciousness.
3. Atrioventricular (AV) Blocks
Think of this as a "wiring issue" in the heart, where electrical signals between the chambers are delayed or completely blocked:
▪Second-Degree AV Block: Some signals fail to reach the ventricles, causing "skipped" beats.
▪Third-Degree (Complete) AV Block: A total disconnect between the heart's upper and lower chambers. ❗️This is a medical emergency that almost always leads to fainting and requires immediate intervention.
☝Important: Fainting caused by bradycardia often happens suddenly, without any warning signs.
With Stethophone, you can check your heart rate yourself. By capturing abnormal slowing or racing of the heart, you provide critical diagnostic data for your physician.
Don’t wait for a symptom to become an emergency. Take a proactive approach to your heart health today.
