Heart & Cardiology/Qrs and qtc



Male aged 39. Slim build.

Had an ecg at a&e aftet chest pain. It read intraventricular conduction delay.

Had usual blood tests and x ray.

My qrs was 122 and qtc 445.

Doctor didnt seem too concerned with the above qrs and qtc values.

1 do i need any more tests to check the health of my heart?

2, can i rule out long qtc?

3, is ivcd serious?


ANSWER: Hello James,

1. No
2. Yees.
3. No ,not at all.

Please write back if this note doesn’t answer all your questions.

David Richardson

---------- FOLLOW-UP ----------

QUESTION: 1. What is the normal qtc duration? It seems to vary on the web

2. Ive been excercising regularly for 20 years now with some weights and cardio. I feel a bit anxious about excercising now. Is it safe for me to excercise?

3. Does my qrs and qtc values above increase my chances of a heart problem such as scd?

Many thanks

Compared with the middle quintile (401 to <410 ms QT duration), those above the 95th percentile (≥439 ms) had a greater risk of all-cause mortality, cardiovascular disease mortality, coronary heart disease mortality, and non-cardiac mortality.  In addition, those below the 5th percentile (<377 ms) also had an increased risk of cardiovascular and non-cardiovascular death compared with the reference middle quintile.

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David Richardson


Adult heart function and disease. Not very good about children lesss than 12. Hypertension is o.k. Heart rhythm a special interest.


Certified in cardiology by the American Board of Internal Medicine. Was chairman of division of cardiology at the Medical College of Virginia. Am now mostly retired.

Fellow of American Heart Association and American College of Cardiology and member of American Physiological Society..

Circulation, American Heart Journal, Hypertension.

M.D. from Harvard Medical School. Residency training at Yale Uhniversity School of Medicine and Medical College of Virginia.

Awards and Honors
Gold Heartt Award from American Heart Association in 1995.

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