Carlo Pappone, Giuseppe Oreto*,
Adriano Salvati, Francesco Lullo, Filippo Gullotta, Stefano Bianchi, Patrizio Mazzone,
Maria Luisa Loricchio, Francesco Furlanello, Sergio Chierchia.
Cardiology Department, S. Raffaele Hospital, Milan,
*Department of Medicine and Cardiology, University of Messina, Messina, Italy
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Inappropriate sinus tachycardia is far more common in
females than in males, with a 5:1 ratio, and has been mainly observed in young adults,
with an average age of about 30 years5. Symptoms
include palpitations, dizziness, presyncope or, more rarely, syncope. Physical examination
is normal, as well as chest X-ray, echocardiogram and laboratory tests; in particular
urinary cathecolamines have been shown to be normal.
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