Incidence and Prognostic Implications of Severe Ventricular Arrhythmias during Maximal Exercise Testing

Abstract

Among 7,500 consecutive maximal exercise tests (MET), we have observed 6 cases of ventricular fibrillation (VF) and 40 cases of ventricular tachycardia (VT); 13 patients had a sustained VT and 27 patients had a single short run of VT. No patient died immediately but 11 patients died during the follow-up. The prognosis was determined by the underlying disease (most often coronary artery disease) and the type of arrhythmia. The 5-year survival rate was 84% in patients with a short run of VT and only 43% in patients with VF or sustained VT.

Does ergometric stress test induce a procoagulative condition in patients with previous myocardial infarction?

“…Myocardial ischemia, severe anhythmias, and even sudden death induced by acute exercise, are well documented. [22][23][24][25][26] Experimental and clinical data suggest that platelets may contribute to these adverse clinical event^.^^.^^ In fact, autopsy examinations showed platelet aggregates in the coronary c i r c~l a t i o n .~~ On the other hand, to our knowledge, there is no agreement among authors about the effect of acute strenuous exercise on blood coagulation and fibrinolysis both in patients with coronary artery disease and in healthy subjects. Increased release of the tissue plasminogen activators without significant changes of the inhibiting factors could account for enhanced fibrinolysis after strenuous exercise.…”

Η Ταχύτης Αποκαταστάσεως Της Καρδιακής Συχνότητος Μετά Από Δοκιμασία Κοπώσεως Ως Δείκτης Για Τη Διάγνωση Της Στεφανιαίας Νόσου

“…Στα 15 εργαστήρια που πήραν µέρος στη µελέτη Seattle Heart Watch αναφέρθηκαν 5 περιπτώσεις µη θανατηφόρου κοιλιακής µαρµαρυγής σε σύνολο 10.700 εξετάσεων89 . Οι Detry και συν90 . ανακοίνωσαν 6 περιπτώσεις κοιλιακής µαρµαρυγής σε 7.500 δοκιµασίες µέγιστης κόπωσης .…”