Is right bundle branch block serious?

Depends. Right bundle branch block (rbbb) in and of itself is likely not a detrimental issue, however if it happens in the setting of a heart attack, it portends a poor prognosis.
Depends on cause. May be expected after repair of ventricular septal defect. Otherwise usually related to subendocardial injury on the right side of the interventricular septum. Sick sinus syndrome, coronary artery disease. Serious but if the left bundle goes, treated with pcemaker.

Related Questions

Would it be possible that a rbbb (right bundle branch block) cause a heart murmur?

No. But there are conditions that can both cause a heart murmur and a rbbb (for example, pulmonic stenosis or an atrial or ventricular septal defect). Read more...
No. A rbbb is a pattern seen in the ECG where the electrical impulse is delay or interrupted as it spread along the heart. Prevalence increase with age. At 80 y/o close to 10% people can have it. Somewhat benign but an evaluation need to be done to r/o heart and lung conditions. Conditions like copd, cad, myocarditis, valvular heart disease, and other structural heart conditions. Read more...

Is a right bundle branch block serious? I have a history of SVT, thanks!

No. Generally RBBB is not serious - it can even be present from birth. With your hx of SVT, there are certain abnormalities that need to be considered and excluded: atrial septal defect and mitral stenosis. Lung conditions can cause it. Sometime high blood pressure is the cause. There are rare causes too, but in most cases, it's an isolated finding of no significance. In itself RBBB causes no symptoms. Read more...

What is the treatment for a right bundle branch block? Is this serious?

Nothing. There is no treatment for this. It is caused by a delay in the electrical system of your heart. Usually it just happens, but it can be caused by a previous heart attack, so you should ask your doctor about that. If it just happened, no heart attack, don't worry too much. It won't really affect you very much. Read more...
None necessary. No treatment necessary and it is not serious unless other heart blocks or conditions are present. Read more...

I am diabetic, age 36. I have lightheadedness problem also. Yesterday I got 'Right Bundle Branch Block' in my ECG report. Is it a serious problem?

Not really. RBBB typically is not a worrisome finding as it does not correlate with ischemia/CAD as new LBBB does. Having said that, because you are "lightheaded", a holter monitor and resting echo may be warranted to evaluate for any other arrhythmias and for structural heart disease, respectively, if any. Last as u r of South Asian descent, pls be sure to check ur fasting lipids, glucose and don't smoke. Read more...