What HR does a stethoscope pick up?
My son is 17 months old and has had a Medtronic EnPulse dual chamber, rate responsive pacer his whole life due to complete congenital heart block. So while the atrial part of his heart works pretty well, the ventrical part does not ... because the atrial cannot communicate at all with the ventrical. His ventrical rate (which the doctors refer to as his underlying heart rate) is average 43 bpm. So when his pacemaker is working well, his natural atrial rate might be 150 and his natural ventrical rate 43. The pacemaker takes the 150 rate and tells the ventrical to match it. When I was pregnant, they could never get an accurate heartrate without doing a manual count on an ultrasound because the doppler detectors used in pregnancy would pick up the atrial rate at 150 but not the ventrical rate at 50 -- or both and not function correctly. Currently, my son has a fractured atrial lead .... so his ventrical lead is set to motion and he is operating at average, 80-90 bpm. Okay .... so the question ...
Recently we went to the pediatrician because my son had a cough. The pediatrician listened to him with a stethoscope and said he was getting the heartrate at about 50 bpm. I did a carelink phone check that night and everything is working fine. SO - when the doctor listens with a stethoscope, what does s/he hear??? The unpaced atrial rate (and unmatched to the ventircal), the paced ventrical rate, or something else the pacemaker is doing???
Thanks in advance - this really puzzles me! :)
You know you're wired when...
You fondly named your implanted buddy.
I am an avid scuba diver.