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Remote Magnetic Navigation With Irrigated Tip Catheter for Ablation of Paroxysmal Atrial Fibrillation
Background—The remote magnetic navigation system (MNS) has been used with a nonirrigated magnetic catheter for atrial fibrillation (AF) ablation. The objective of this study was to evaluate theExpand
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Chemoreflex and metaboreflex responses to static hypoxic exercise in aging humans.
PURPOSE We tested the hypothesis that aging decreases the contribution of metaboreceptors to sympathetic responses during exercise in hypoxia. METHODS We recorded sympathetic nerve traffic toExpand
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Acute Cardiovascular and Sympathetic Effects of Nicotine Replacement Therapy
Sympathetic overactivity is implicated in the increased cardiovascular risk of cigarette smokers. Excitatory nicotinic receptors are present on peripheral chemoreceptor cells. Chemoreceptors locatedExpand
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Facial cooling and peripheral chemoreflex mechanisms in humans
Aim:  Reductions in arterial oxygen partial pressure activate the peripheral chemoreceptors which increase ventilation, and, after cessation of breathing, reduce heart rate. We tested the hypothesisExpand
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Sympathoexcitation Increases the QT/RR Slope in Healthy Men: Differential Effects of Hypoxia, Dobutamine, and Phenylephrine
Introduction: Dynamic ventricular repolarization assessed by QT/RR slopes studies the effects of modifications in cardiac repolarization independently of variations in RR interval (RR). The effectsExpand
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Preprocedural Clinical Parameters Determining Perimitral Conduction Time During Mitral Isthmus Line Ablation
Background—Achievement of complete conduction block across left mitral isthmus (MI) is challenging. Anticipation of perimitral conduction time (PMCT) associated with MI block may expedite thisExpand
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Dose-dependent effect of dobutamine on chemoreflex activity in healthy volunteers.
AIMS beta-adrenergic agonists increase peripheral chemoreceptor sensitivity in humans. We tested the hypothesis that beta(1)-agonist-related increase in peripheral chemoreflex sensitivity isExpand
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Differential effects of metaboreceptor and chemoreceptor activation on sympathetic and cardiac baroreflex control following exercise in hypoxia in human
Muscle metaboreceptors and peripheral chemoreceptors exert differential effects on the cardiorespiratory and autonomic responses following hypoxic exercise. Whether these effects are accompanied byExpand
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Nicotine increases chemoreflex sensitivity to hypoxia in non-smokers
Background The peripheral chemoreflex contributes to cardiovascular regulation and represents the first line of defence against hypoxia. The effects of nicotine on chemoreflex regulation inExpand
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Arteriovenous fistula closure after renal transplantation: a prospective study with 24-hour ambulatory blood pressure monitoring.
We prospectively evaluated the effects of arteriovenous fistula closure on 24-hour ambulatory blood pressure measurements and on left ventricular geometry assessed by echocardiography. Sixteen kidneyExpand
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