Heart & Cardiology/bradycardia


Hello again.
I have written to you before concerning my 15 yr old son who has had 2 blackouts of unknown cause, he had a loop recorder implanted in july he has  frequent episodes of bradycardia as low as 38-40, when it's this low he is obviously very tired, dizzy and poor cocentration, he's a little overweight not athletic in any way... Tuesday his 'box'  was read for the first time. nothing abnormal was shown on it, and he will be seen again in 4 months...

Our  cardiologist said 'yes'  his heart  beats slowly, but it is in sinus rhythm, and because of his age, unless the rhythm changes or he has another blackout, he will not consider a pacemaker.

How low does your  HR have to go,to be noted as marked bradycardia  on a loop recorder??
Do you agree with our cardiologist about a pacemaker??


p.s  there has been 4  sudden deaths  in my family...

Hello Maria,

45 awake, 35 asleep are the lower limits of normal heart rate, so I guess slower than that would be considered marked bradycardia.
Yes, I agree about the pacemaker.
Of the 4 sudden deaths, how many were below age 45?  Did any have bradycardia?

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

David Richardson

Heart & Cardiology

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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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