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Principal Investigator:

Vahid Mohsenin, MD
Fellow,
The John B. Pierce Laboratory

Director, Yale Center for Sleep Medicine
Professor in Internal Medicine
Yale University School of Medicine

Research Interests

Sleep apnea and intermittent hypoxia are associated with significant vascular dysfunction in the form of hypertension, myocardial infarction and stroke.  Mohsenin’s research interest is to explore the mechanisms underlying endothelial and vascular dysfunction due to hypoxia-reoxygenation in the setting of obstructive sleep apnea.  We have shown that sleep apnea increases the risk of stroke and death independent of known risk factors for stroke.  We have demonstrated that subjects with severe sleep apnea have impaired cerebrovascular autoregulation in response to fluctuations in arterial blood pressure.  In parallel with human studies we are conducting experiments on mice exposed to intermittent hypoxia to investigate the basic molecular mechanisms operative in the development of hypertension and vascular dysfunction.

Current Projects

The majority of Dr. Mohsenin's current projects take place at the Yale Center for Sleep Medicine where he is currently the Director.

Representative Publications

Shah, N.A., H.K.Yaggi, J Concato and V. Mohsenin. Obstructive Sleep Apnea as a Risk Factor for Coronary Events and Cardiovascular  Death. Sleep Breath September 2009 ahead of print.

Botros,N. V. Mohsenin, J. Concato, B. Selim, K. Doctor, H. K. Yaggi. Obstructive Sleep Apnea as a Risk Factor for Type II Diabetes. Am. J. Med. 122:1122-1127, 2009

Roux, F., C. D’Ambrosio, and V. Mohsenin. Sleep-related breathing disorders and cardiovascular disease. Am. J. Med.  2000, 108:396-402.

Mohsenin, V. Sleep-related breathing disorders and risk of stroke.  Stroke 2001, 32:1271-1278.

Mohsenin, V. Gender Differences in the Expression of Sleep Disordered Breathing: Role of Upper Airway Dimensions.  Chest 2001, 120:1442-1447.

Yaggi, H. and V. Mohsenin. Sleep-disordered breathing and stroke. Clin. Chest Med. 2003;24:223-237.

Mohsenin, V.  Sleep apnea: Implications in cerebrovascular disease. Preventive Cardiology 2003; 6:149-154.

Mohsenin, V. Effects of gender on upper airway collapsibility and severity of obstructive sleep apnea. Sleep Medicine 2003;4:523-529.

Yaggi, K. and V. Mohsenin.  Obstructive Sleep apnea and Stroke. Lancet Neurol. 2004; 3:333-342.

Yaggi, K.H., J. Concato, W. N.Kernan, J.H. Lichtman, L.M.Brass, V. Mohsenin. Obstructive Sleep Apnea as a Risk factor for Stroke and Death. N. Engl. J. Med. 353:2034-3041, 2005.

D’Ambrosio, C.D., N.S. Stachenfeld, M. Pisani, and V. Mohsenin.  Sleep, Breathing, and Menopause: The effect of fluctuating estrogen and progesterone on sleep and breathing in women. Gender Med. 2:238-245, 2005.

Yaggi, K.H. and V. Mohsenin.  Sleep Apnea, Stroke, and Causal Inference: Public Health Implications. In: Pandi-Perumal SR, Leger D., editors. CRC Press. 2006. Sleep Disorders: Their Impact on Public Health.

Yaggi, K.H. and V. Mohsenin.  Sleep Apnea and Stroke.  A Risk factor or an Association? Sleep Med. Clinic. 2:583-591, 2007.

Mohsenin, V., H.Klar Yaggi, N. Shah,and J. Dzuira.  The Effect of Gender on the Prevalence of Hypertension in Obstructive Sleep Apnea. Sleep Med. (in press).

Urbano, F., F. Roux, J. Schindler, and V. Mohsenin. Impaired cerebral autoregulation in obstructive sleep apnea. J. Appl. Physiol. 105:1852-1857, 2008.