sleep apnea

[trgf]

would untreated sleep apnea in elderly be associated with respiratory alkalosis or with right ventricular hypertrophy?
the evidence for the latter seems to be somewhat controversial, correct?

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[512TA]

would untreated sleep apnea in elderly be associated with respiratory alkalosis or with right ventricular hypertrophy?
the evidence for the latter seems to be somewhat controversial, correct?

RVH as given in UW.
pulmonary hypertension--> RVH
why should it be respiratory alkalosis. SaO2 in sleep apnea decreases below 92% and there is cessation of respiration for >9 seconds.

 

[trgf]

Well, the reason I am asking is twofold:
http://emedicine.medscape.com/article/304967-diagnosis "...The laboratory findings in persons with central sleep apnea syndromes are not helpful except for a finding of respiratory alkalosis (PaCO2 <40 mm Hg while awake) in patients with primary central sleep apnea, high-altitude periodic breathing, and CSB. Patients with heart failure and high-altitude periodic breathing may also have relative or absolute hypoxia shown with arterial blood gas analysis."
and
http://content.karger.com/produktedb/produkte.asp?typ=fulltext&file=RES2005072003278
...The reasons for the disparate conclusions of the prior studies examining right ventricular hypertrophy, systolic function, and right ventricular enlargement are not certain. In a study [35], right atrial and ventricular dimensions, and right ventricular systolicfunction were not found to be significantly different betweensubjects with sleep-disordered breathing and the low respiratory disturbance index subjects, but this study indicated that sleep-disordered breathing was associated with increased right ventricular wall thickness in a general population [35].

has there been any compelling evidence that refutes these two facts recently?