Obstructive sleep apnea syndrome

Of special interest to us are the electro-anatomical origins of atrial supraventricular extrasystoles in patients with paroxysmal atrial fibrillation induced through variations in intrathoracic pressure. These fluctuations in thoracic pressure occur more frequently at night in patients who suffer from obstructive sleep apnea syndrome. In another study, we are assessing the impact of obstructive sleep apnea on the thoracic aorta.

Additionally, our department performs epidemiological studies where the prevalence of obstructive sleep apnea in patients with Ehlers-Danlos Syndrome is assessed.

If you are interested in participating in a research project, we would be pleased to send you more detailed information. Please feel free to contact us anytime at the address provided.

Current projects

TitleEthical approval numberClinical trial Registration
Is obstructive sleep apnea a risk factor for thoracic aortic aneurysm expansion? A prospective cohort study2014-0035
​The effects of CPAP withdrawal on cerebral vascular reactivity and brain oxygenation in OSA
​The effects of suboptimal use of CPAP therapy on symptoms of OSA
​Breath analysis in obstructive sleep apnea


Tel +41 44 255 49 47
Fax +41 44 255 44 51


Professor Malcolm Kohler, MD, Director of Department
Dr Christian Clarenbach, MD, Attending Physician
Dr Thomas Gaisl, MD, Research Fellow
Sira Thiel, MD, Doctorand
Dr Maurice Roeder, MD, Reserach Fellow

Contact address

Department of Pulmonology
Professor Malcolm Kohler, MD
University Hospital Zurich
Rämistrasse 100
8091 Zurich

Last update: 20.11.2018 | Person responsible:
Professor Malcolm Kohler, MD