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New Left Bundle Branch Block poster

Posted by jacqincalifornia @jacqincalifornia, Dec 24, 2025

Hi all,
I'm a 73 yr old woman, diagnosed with LBBB two years ago and put on metoprolol. Since then my condition has been pretty unremarkable, other than having some challenges with blood pressure that sometimes gets too low because of the metoprolol.

In October I had a routine colonoscopy - when I failed to 'wake up' from the anesthesia I was given flumazenil to reverse the effect of anesthesia (a brutal way to come out of anesthesia), whereupon my heart immediately went into bigeminy, then what the hospital doctors diagnosed as V-tach for about 10 minutes. After re-infusing electrolytes (depleted from the colonoscopy prep) my heart rate stabilized but at that point I was admitted to the hospital for about 4 days.

There is now a disagreement between my cardiologist and the hospital doctors about whether I was in V-tach or SVT. I'll be seeing the EP doctor in a few weeks and will ask his opinion about this.

I just completed 30 days ambulatory heart monitoring. I have a partial report of what was happening when I reported symptoms. Mostly PVCs and PACs, and a few other abnormalities which I think reflect the LBBB but not sure.

One question I have at the moment is whether those of you with LBBB experiencing a lot of PVCs (or PACs).

I'm glad to have found this group, I look forward to the discussions.

Interested in more discussions like this? Go to the Heart Rhythm Conditions Support Group.

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jc76 | @jc76 | Dec 24, 2025

@jacqincalifornia
Was diagnosed with LBBB about 25 years ago. The PVCs and PACs started up but other than nuisance and feeling them taking my pulse the did not get bad until 2015.

I had an ablation about 10 years ago in RV which stopped the PVCs in the RV. But after a few years the LV PVCs started increasing dramatically. My EP (Mayo Jacksonville) wanted to wait for another ablation and try medications as the PVCs coming from LV were 3 different areas.

I was put on Mexiletine (spell) and take it every 8 hours. Dramatically reduced PVCs and PACs non sustained VTAC.

I found stress, anxiety, worrying, caused more PVCs and PACs and my EP confirmed they will. Caffine is another trigger. What I found for me was to engage in exercise (check with your doctors) that I liked really helped. I do water aerobics 5 days a week. I also read quite a bit (history) as relaxes me also. Weight can also (per my EP) can cause PACs and PVCs with extra strain on heart.

I am not familiar with bigemmy. What is that? I had a colonoscopy about 2.5 years ago and had anesthesia but had no complications. I do know that that I have gone into ER after my ICD/Pacemaker has gone off (I had my first implanted in 2006 as EF was getting low with cardiomyopathy) and first thing the check is electrolytes.

I hope my experience with this helped.

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ness125 | @ness125 | Dec 24, 2025

Hello @jacqincalifornia
I have an incomplete RBBB and I have PVC’s and some Atrial tachycardia. I am on Diltiliazem 120 ER mg daily. I was on Flecainide 50 mg twice a day which helped, but after 2 months I developed side effects, so I cut my tablets in half and take 1/2 twice daily. My cardiologist prescribed Metroprolol 25 mg once a day to add to the other 2 meds, but I haven’t taken it yet because I don’t feel I need it. I still gave some PVC’s but just trying to live with them because the doctor said my heart is good otherwise and not bad enough for an ablation. I’m 72 and have had PVC’s for about 30 years.

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gloaming | @gloaming | Dec 24, 2025
In reply to @jc76 "@jacqincalifornia Was diagnosed with LBBB about 25 years ago. The PVCs and PACs started up but..." + (show)
Profile picture for jc76 @jc76

@jacqincalifornia
Was diagnosed with LBBB about 25 years ago. The PVCs and PACs started up but other than nuisance and feeling them taking my pulse the did not get bad until 2015.

I had an ablation about 10 years ago in RV which stopped the PVCs in the RV. But after a few years the LV PVCs started increasing dramatically. My EP (Mayo Jacksonville) wanted to wait for another ablation and try medications as the PVCs coming from LV were 3 different areas.

I was put on Mexiletine (spell) and take it every 8 hours. Dramatically reduced PVCs and PACs non sustained VTAC.

I found stress, anxiety, worrying, caused more PVCs and PACs and my EP confirmed they will. Caffine is another trigger. What I found for me was to engage in exercise (check with your doctors) that I liked really helped. I do water aerobics 5 days a week. I also read quite a bit (history) as relaxes me also. Weight can also (per my EP) can cause PACs and PVCs with extra strain on heart.

I am not familiar with bigemmy. What is that? I had a colonoscopy about 2.5 years ago and had anesthesia but had no complications. I do know that that I have gone into ER after my ICD/Pacemaker has gone off (I had my first implanted in 2006 as EF was getting low with cardiomyopathy) and first thing the check is electrolytes.

I hope my experience with this helped.

Jump to this post

@jc76 https://my.clevelandclinic.org/health/diseases/24576-bigeminy 😀

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jacqincalifornia | @jacqincalifornia | Dec 25, 2025

Thank you for the replies. It sounds like there is a definite connection of the LBBB with PVCs. I find them a little unsettling sometimes, but unless they're actually dangerous in some way, I probably wouldn't seek treatment for them. I imagine the frequency of PVCs and PACs could reach a level that would concern my cardiologist(s) but not sure.

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