I assume you know this is a community, not an "ask the doctor" forum. There are no doctors here.
EKG interpretation is not easy, especially for lay people like us. I'm a little "EKG nerd" myself, but I don't have any lisence for interpreting EKG's, and it would be wrong to try. I won't interpret your EKG's but I can explain some of the content.
First, RBBB (right bundle branch block) is a benign condition. We all have RBBB when we are born, but it disappears in most of us during childhood. A cardiologist told me that approx. 5% of us have RBBB (complete or incomplete) patterns in EKG as adults.
The way you describe it, this is obviously RBBB. It's also known as "rabbit ears" in V1.
What I don't understand, and what you can ask your cardiologist, is why the RBBB suddenly appeared. I can see your QRS duration is somewhat long in your first EKG, maybe this was an incomplete RBBB after all? I don't know. My QRS duration is a bit prolonged too, without any obvious reason (100-110 msec).
As I told you, RBBB is usually a benign condition, in contrast to LBBB, that is always caused by heart muscle damage. In RBBB, the electrical pathway to right ventricle is dysfunctional, so the signal must travel to LV first, then to RV, causing a prolonged QRS complex. This is visible in V1 as a spike after activating LV (because V1 "sees" RV, the negative deflection (down spike) is the activation of LV, with reversed current). The up-spike after the downspike is end-activation of RV after LV. The S in V5/V6 has the same reason, these leads "sees" LV, and you get a negative deflection from RV with reversed current.
The slightly prolonged QT is due to prolonged QRS in the setting of RBBB. To calculate QT, you remove the QRS time above 120 msec. In that case, your QT is fine.
The most important question is probably: Why did the RBBB occur? If you have a copy of the 5 year old EKG, bring it! It has great value.
Rememeber: As this usually is a benign condition, there's no need to panic. RBBB is extremely common. It's good that you're seing a cardiologist just to get this out of your head.
Best wishes :)
I have rate dependent, intermittent LBBB, with no heart muscle damage. I have had every test in the book, and an ablation for AVNRT. I still, and will always have the LBBB. Anyway, maybe intermittent doesn't require heart muscle damage? I just hadn't heard that before, that all LBBB is caused by heart muscle damage. Just curious. My cardiologist and EP doctor have both said it is a benign condition, here hoping! lol
Thanks for taking the time to thoroughly answer. I realize this isn't a "doctor" community. (Once upon a time, I was quite active in the gastroenterology and GERD communities.) That said, there are usually a few people willing to give a responsible and thorough answer to an in depth question. Your reply did just that.
Although I am still quite concerned, I'm feeling somewhat better about this, or rather, any underlying conditions which may be causing this. The fact that there has been a marked change is what's really bothering me. As it so happens, I also have other previous EKGs from when I visited a cardiologist about 3 years ago at the Cleveland Clinic in Weston, FL. I didn't have those scans on hand, but I'll be sure to acquire the records before my next cardio appointment.
Once again, thank you.
Hello both of you :)
Joshua: Rate dependent LBBB doesn't count. I'm talking about permanent LBBB, I don't know why RBBB is benign and LBBB is not, I guess none of them are problematic themselves, but LBBB usually has a cause. RBBB usually don't have a cause. Intermittent bundle branch blocks are usually right. Some people have both. I often get PACs with RBBB pattern, and they can be misinterpreted as PVCs. If they follow a LBBB pattern, doctors almost always misinterpret them as PVCs because PVCs usually occur in the RV; they are conducted to LV through slow pathways; showing a LBBB pattern. You can relax :)
It's good you're feeling better. I guess your cardiologist will provide most of the answers, but remember, though this condition looks scary on EKG, it's benign, and it doesn't indicate that your right ventricle will stop working or something like that. If the ventricles at some point get really unsynchronized, pacemaker therapy is available, but almost never used (because RBBB is a condition best forgotten that never gives symptoms). Yes, try to find your EKGs because the cardiologist will have the entire "history" of your heart. It's really valuable for him to see. I hope everything will be OK and that you can relax completely after you visit him!
Don't say RBBB is benign. Brugada Syndrome always inclusive a RBBB showed on EKG. Of course, it has other like ST segment elevation in leads V1 to V3.
I, myself also got RBBB which I have wpw at the young age of 15.
I don't know how to read EKG. I'm not a doctor either. I got the info from web.
Hi, I see your point, but in my opinion it's a little like saying "don't say sinus tachycardia is benign, because it occurs in heart failure". There are some non-benign causes to RBBB patterns, yes, but they are rare. Brugada (type 1 pattern) can look like RBBB due to the ST elevation, but I guess the EKG would be described more like ..IV\.. rather than ..^^u..
I'm not a doctor either, we get the information mostly from the web (which I admit is a bad thing)..