Aa
A
A
Close
Avatar universal
longer P-R Interval
I had a heart attack in 2004. EKG showed no heart muscle damage. I have had nuclear stress test last year(2010) and it showed normal EKG.
Few days ago while I was bicycling early morning (7 AM) in rather warm weather (82 F) after only 4 miles, I felt very uncomfortable and very tired. There was left shoulder pain and all of left hand was very tired for many hours. So around I went o my doc's office and they did an EKG. It showed all was fine except that the P-R interval was 230 mSec. Last year's (2010) EKG was normal but I don't know the exact P-R interval number.

Should I be concerned? Not at all, a little, a lot? Should I slow down my exercises? I routinely push my heart rate to 180-185 bpm for a minute or so but several times in an hour's jog. Stop doing that? It doesn't matter?

Appreciate your comment, particularly if you are a cardiologist and a jogger/runner.
-Ravi
Cancel
1 Answers
Page 1 of 1
1124887 tn?1313758491
I strongly doubt you will find someone who is both a cardiologist and a runner here (though cardiologists tend to keep in good shape). This is a community, not an "ask a doctor" forum.

Anyway, the fact that you are able to push your heart rate to 185 bpm is itself a sign that your (borderline) 1st degree AV block probably decreases with higher heart rate. A stress test will confirm that. 1st degree AV block (PR above 220 msec) is usually a benign condition, and your PR time is just borderline long. PR time will, as mentioned above, change from moment to moment, it changes with heart rate, adrenaline/stress, electrolytes in the blood, etc. Beta blockers and calcium channel blockers may prolong the PR interval.

I think you should ask your doctor if it's safe for you after a heart attack to push your heart rate to 185 bpm. "Calculated" max heart rate for you is 165 bpm, but this rule has a lot of exceptions. In my family, the maximum heart rate is high, I have a max heart rate of 220, and my mom who is about your age, have a max heart rate of 190. What of course is important, especially after a heart attack, is to make sure that you are in normal sinus rhythm when your heart rate is this high. I assume your stress test did confirm this.

Take care, and I hope a doctor will answer you (it may happen but it's quite uncommon here)

Comment
Cancel
Comment
Avatar universal
Comment
Comment
Submit Comment
Your Answer
Avatar universal
Answer
Know how to answer? Tap here to leave your answer...
Answer
Submit Answer
A
A
Top Heart Disease Answerers
159619 tn?1318997813
Blank
erijon
Salt Lake City, UT
11548417 tn?1440481484
Blank
Ger57
Netherlands
Avatar m tn
Blank
caregiver222
Avatar f tn
Blank
achillea
CA
Avatar m tn
Blank
tacolino
Ireland
Blank
BloodPressure Tracker
Monitor Your Blood Pressure
Start Tracking Now
Blank
HeartRhythm Tracker
Track your Heart Condition
Start Tracking Now
Heart Disease Community Resources
RSS Expert Activity
233488 tn?1310696703
Blank
Marathon Running Done Over Many Yea...
05/15 by John C Hagan III, MD, FACS, FAAOBlank
233488 tn?1310696703
Blank
New Article on Multifocal IOL vs &q...
05/15 by John C Hagan III, MD, FACS, FAAOBlank
748543 tn?1463449675
Blank
TMJ/TMJ The Connection Between Teet...
01/15 by Hamidreza Nassery , DMD, FICOI, FAGD, FICCMOBlank
Top Heart Disease Answerers
159619 tn?1318997813
Blank
erijon
Salt Lake City, UT
11548417 tn?1440481484
Blank
Ger57
Netherlands
Avatar m tn
Blank
caregiver222
Avatar f tn
Blank
achillea
CA
Avatar m tn
Blank
tacolino
Ireland