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Doctor insights on: Lbbb On Ekg

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I am a 28 year old female who was just found to have LBBB on an EKG during my physical. I feel fine and have normal bp. Could I have something serious

I am a 28 year old female who was just found to have LBBB on an EKG during my physical. I feel fine and have normal bp. Could I have something serious

Requires follow up: Lbbb is an unusual finding in a normal heart, and requires further testing and follow up. At the very least, you should undergo an echocardiogram. If normal, it should be repeated every 5 years or so. An exercise stress test and a 24 hour holter monitor may also be appropriate, but are not mandatory. You should see a cardiologist. ...Read more

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Dr. Tiffanie Noonan
3 doctors shared insights

Electrocardiogram (Definition)

Electrocardiogram (ecg, ekg) is a print-out of the electrical forces detected by electrodes on the chest wall, as electricity travels through the heart with each heart beat. The electrodes are placed in different positions, and each position "sees" the electrical activity of the heart from its own vantage point. Abnormalities in signal detected at chest surface ...Read more


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Could I have cardiomyopathy with no other symptoms but an LBBB on my ekg? I have an appt w/ a cardiologist in a few days, but i'm nervous from reading

Could I have cardiomyopathy with no other symptoms but an LBBB on my ekg? I have an appt w/ a cardiologist in a few days, but i'm nervous from reading

Maybe: The finding of lbbb on an ECG can be seen in cardiomyopathy, myocarditis, ischemic heart disease, left ventricular hypertrophy, and several other conditions. It can occasionally be present in a normal heart. Most people with cardiomyopathy have symptoms as well. Keep your appointment with your cardiologist. ...Read more

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Hi i went to urgen care on thursday because i was having chest pain. They did a EKG and it came back abnormal the said I have lbbb, how do you treat ?

Hi i went to urgen care on thursday because i was having chest pain. They did a EKG and it came back abnormal the said I have lbbb, how do you treat ?

Go to heart dr.: You go to cardiologist. Most of the time you don't need to treat lbbb, but you deffinately need to get your heart checked. ...Read more

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Ekg results; vent 81bpm, p duration 122, qrs duration 138, pr interval 178, qt/qtc 392/428? How abnormal is this? Only diagnosis I have is lbbb.

Ekg results; vent 81bpm, p duration 122, qrs duration 138, pr interval 178, qt/qtc 392/428?  How abnormal is this?  Only diagnosis I have is lbbb.

Depends: Lbbb is abnormal. It may be associated with coronary heart disease, high blood pressure, an enlarged heart, or cardiomyopathy (heart muscle disease). Rarely, it can be congenital (present at birth). The significance of lbbb depends on the presence or absence of associated heart disease and whether it is a new finding or has been present for several years. May need echocardiogram and/or heart cath. ...Read more

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My dad (66) has LBBB since 4 yrs ago on several ekg's. His mom had CAD. Cardiologist did lots of test 2 times, found nothing. Cause? Is it fatal?

My dad (66) has LBBB since 4 yrs ago on several ekg's. His mom had CAD.  Cardiologist did lots of test 2 times, found nothing. Cause? Is it fatal?

Maybe, maybe not: There're quite a few causes of LBBB. Aortic stenosis, dilated cardiomyopathy, acute heart attack, coronary artery disease, disease of the cardiac electrical conduction system, long standing untreated hypertension, lyme disease etc...even some viral infections can cause this. Since his testing=negative, he is NOT more likely to die than other men his age. Regular follow up is advisable. Good luck! ...Read more

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My EKG now reads escape rhythm, LBBB, & intraventricular conduction delay. What does this indicate? I was started on digoxin to hold me up for a week

My EKG now reads escape rhythm, LBBB, & intraventricular conduction delay. What does this indicate? I was started on digoxin to hold me up for a week

Complicated: Since you had an ablation, you're obviously under the care of electrophysiologist, so you should trust their judgement. You have a complicated situation. Your rhythm isn't textbook normal but may be fine for you. If you're not feeling well now (you mention dizziness in particular), please contact your EP right away. ...Read more

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Does a "Normal ECG" report indicates there is nothing like LBBB or past heart attack, stroke or cardiac attack ?

Does a "Normal ECG" report indicates there is nothing like LBBB or past heart attack, stroke or cardiac attack ?

ECG not great.: While certain things, like a LBBB, would be evident and obvious on an ECG, other things, like previous heart attacks, or more importantly the risk for a future heart attack, may be frustratingly absent from a resting ECG. Echocardiogram and stress test may be more useful cardiac tests for risk stratification. ...Read more

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For 58+ F, can presence of LBBB in ECG be indicative of any previous heart attack or stroke ? How risky is it for future heart health ?

For 58+ F, can presence of LBBB in ECG be indicative of any previous heart attack or stroke ? How risky is it for future heart health ?

Absolutely, LBBB is: a result of endocardial muscle damage/infarction of the Perkinje fibers & surrounding muscle. Endocardial muscle (because heart contraction blocks capillary flow during each beat) is always most susceptible to ischemic damage (heart attack) yet least reflected on surface EKG other than by elongation of the QRS duration. Thus QRS duration beyond 80 msec is the most sensitive sign of heart attack. ...Read more

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What causes new occurring lbbb in healthy 17 year old. 4 yr ago I had a borderline ecg and my qrs was 103 and now it's 161. Can lbbb be reversible? I've been to 2 drs and one also said all he sees is wpw and I've had heart flutters for 6 years.

What causes new occurring lbbb in healthy 17 year old. 4 yr ago I had a borderline ecg and my qrs was 103 and now it's 161. Can lbbb be reversible? I've been to 2 drs and one also said all he sees is wpw and I've had heart flutters for 6 years.

It is hard to: believe that an 18 year old would develop 'New" LBBB. I believe I answered that specific question for you some days ago including potential causes. Without seeing the various EKGs myself I cannot believe the interpretations. Ventricular pre excitation with variable conduction characteristics could potentially explain the findings. You need to see an Electrophysiologist for this. ...Read more

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Can LBBB be reverted?

Can LBBB be reverted?

Often permanent: I have only seen it once in a patient who developed lbbb with a viral infection/myocarditis and several weeks following resolution of the illness, the lbbb also resolved. Otherwise, al other cases so far have been "permanent finding." it is not a dangerous thing, just a bit difficult to interpret when you are actively having issues with your heart such as a heart attack. Worry not anita. Good luck. ...Read more

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Can myocardial bridge cause lbbb?

Can myocardial bridge cause lbbb?

Bridging: Myocardial bridging is a condition that one is born with and is usually not cause of symptoms. I am not aware of an association between myocardial bridging and left bundle branch block, although it would not be impossible if it were to cause impairment in coronary blood flow. ...Read more

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Is there a link between LBBB and hypertrophic cardiomyopathy?

Is there a link between LBBB and hypertrophic cardiomyopathy?

Not neccessarily: A hypertrophic cardiomyopathy may not involve a lbbb but the cardiomyopathic process can cause interventricular conduction delay and this could manifest as a lbbb. ...Read more

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61yr.fem.w/LBBB-take 12.5/AM, 12.5/PM Metoprolol Tar. Can I up to 25/AM,25/PM for stress of 8 day trip to Ireland, or as/if needed, temporarily?

61yr.fem.w/LBBB-take 12.5/AM, 12.5/PM Metoprolol Tar.  Can I up to 25/AM,25/PM for stress of 8 day trip to Ireland, or as/if needed, temporarily?

You have not said: what you take the Metoprolol for. Your current dose is very small but it is not for stress it is for cardiac or vascular reasons. LBBB will not affect the consideration for dosage adjustment. Your blood pressure and heart rate are bigger considerations. You need to check with your prescriber to determine why you are on low dose and if it is safe for YOU. Without knowing your medical history, No. ...Read more