I know there are positive cardiac benefits associated with treating sleep apnea with PAP.
PAP pressures are measured in cm-H2O; and 1 cm-H2O = 0.73mm-Hg.
So, are we not increasing the pressure that the right ventricle must work against; and increasing the filling pressure into the left atrium?
If the above is true, have there been any studies on how this impacts cardiac health?
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08-06-2014, 03:35 PM
(This post was last modified: 08-06-2014, 03:36 PM by NickDanger.)
I don't see any way that the air pressure can reach the heart. There is no direct pathway from either the windpipe or the esophagus to the heart. The pressure may affect the lungs and can certainly affect the stomach (i.e., aerophagia), but I don't see how the pressure can affect the heart.
Considering average blood pressure is 120/80 mmHg, even if it were to transmit directly to the blood pressure a 0.73 mmHg per cmH20 still falls within normal blood pressure variation during the day (at 20 cmH2O it only amounts to ~14 mmHg).
Perhaps if you're already borderline hypertensive (high blood pressure), it could be an issue, but I think the cardiac benefits of CPAP far outweigh what minor impacts PAP induced pressure could have on blood pressure.