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For example, certain situations of excessive or reduced heart rate (tachycardia or bradycardia, respectively) can cause a BBB known as a rate-dependent bundle branch block (RDBBB). This manifests in a similar fashion to a regular bundle branch block, but occurs only under conditions that affect contractile rate.
And, it's true that severe pressure or tightness in the chest is the most common symptom of a heart attack. But many other chest pain causes can lead to similar types of discomfort, experts say ...
Having a heart attack while exercising is possible but not common. The risk doesn’t mean that you shouldn’t exercise (unless your doctor has specifically told you otherwise). 8 Causes of ...
A right bundle branch block (RBBB) is a heart block in the right bundle branch of the electrical conduction system. [1] During a right bundle branch block, the right ventricle is not directly activated by impulses traveling through the right bundle branch. However, the left bundle branch still normally activates the left ventricle.
Symptoms include chest pain or pain that comes and goes, radiating to the jaw and either arm, fatigue, heart palpitations (myocarditis can cause heart arrhythmias), lightheadedness, shortness of ...
The different types of split S 2 can be associated with medical conditions: Split during inspiration: normal. [3] (See above) Wide splitting: seen in conditions that delay RV emptying (pulmonic stenosis, right bundle branch block). Delay in RV emptying causes delayed pulmonic sound (regardless of breath); it is an exaggeration of normal ...
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A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right. The ECG will show a terminal R wave in lead V1 and a slurred S wave in lead I. Left bundle branch block widens the entire QRS, and in most cases shifts the heart's electrical axis to the ...