Symptoms of Bundle Branch Block
Symptoms of bundle branch block can vary widely. Many people have no noticeable effects, especially in cases of right bundle branch block, while others may experience warning signs linked to underlying heart issues. Common symptoms include fainting, dizziness, fatigue, shortness of breath, and palpitations.
In most cases, bundle branch block is discovered during an ECG performed for another reason. It may not cause any direct symptoms, particularly when the heart otherwise functions normally.
However, when symptoms do occur, they may include:
- Fainting (syncope) or near-fainting episodes, often caused by irregular heart rhythms or inefficient pumping.
- Fatigue, due to reduced cardiac output in some people with left-sided conduction delays.
- Shortness of breath, especially during exertion, may result from the heart not pumping in a coordinated way.
- Palpitations — sensations of a fluttering or irregular heartbeat — may accompany arrhythmias that sometimes develop in people with bundle branch block.
- Chest discomfort or tightness can occur if the underlying issue is related to coronary artery disease or heart strain.
Left alone it’s more likely to be associated with symptoms because it often reflects underlying damage to the left ventricle. It may also mask signs of a heart attack on an ECG, making diagnosis more challenging.
Symptoms of Bundle Branch Block
Sometimes bundle branch block is discovered during evaluation of symptoms like fatigue, exertional dyspnoea, or unexplained collapse — all of which warrant further cardiac investigation.
Recognising symptoms is, especially if they occur suddenly or alongside chest pain, because this may indicate a serious cardiac event such as a heart attack or acute heart failure.
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