PMID: 15376730Sep 21, 2004Paper

Carotid sinus syndrome in an unselected population of eight hundred consecutive patients with syncope. Prevalence and clinical profile

Revista Portuguesa De Cardiologia : Orgão Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
João FreitasMário Carvalho

Abstract

Carotid sinus syndrome (CSS) is frequently underdiagnosed in patients with unexplained syncope or falls. The goal of our study was to assess the value of carotid sinus massage (CSM) in an unselected population with syncope, in the supine position and after prolonged orthostasis. We observed 824 consecutive patients with unexplained syncope referred to our Autonomic Laboratory between October and October 2000 (36 months). For the analysis we studied only patients aged over 42 years (the age of the youngest patient with CSS). One hundred and eight normal healthy subjects served as the control group. CSM was performed after beat-by-beat blood pressure and continuous electrocardiographic monitoring, during supine rest and after prolonged (45 min) orthostasis on a motor-driven tilt table (HTT). Three hundred and eighty-six patients were selected (all more than 42 years old and with unexplained syncope). Six of them were excluded because of contraindication to CSM. Seventy-five patients (20%) had CSS (28% cardioinhibitory type, 22% pure vasodepressor response and 50% mixed type). Forty patients had CSS diagnosed in the supine position and 35 only after HTT. The response type was similar in both positions. The control group had only o...Continue Reading

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