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Grzegorz Styczynski, MD, PhD; Marta Jaltuszewska; Natalia Kosiorowska; Magdalena Kostrzewska; Cezary Szmigielski, MD, PhD

Arch Intern Med. 2009;169(17):1634-1635.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Vasovagal syncope is common in young adults, affecting up to 40% of subjects in this age group, with a female predominance.¹ Its pathogenesis is not clear, but the main theory suggests a central role of the orthostatic venous pooling below the thorax, which leads to paradoxical activation of the cardio-neural inhibitory reflexes by the underfilled ventricles.² We have occasionally seen dilated inferior vena cava (IVC) on echocardiograms of young patients with vasovagal syncope referred for cardiac evaluation. Since this observation could have pathophysiologic significance, we decided to design a study to measure the IVC diameter in a group of young adults with a history of vasovagal syncope.

Methods

On the basis of the results of the questionnaires distributed among medical students, we identified 53 subjects with typical vasovagal syncope or near-syncope in their medical history (mean number . . . [Full Text of this Article]

Results

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AUTHOR INFORMATION


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