Pacing and clinical electrophysiology : PACE
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Pacing Clin Electrophysiol · Aug 2011
Intrathoracic impedance and ultrasound lung comets in heart failure deterioration monitoring.
Echographic examination of the lung surface may reveal multiple ultrasound lung comets (ULCs) originating from water-thickened interlobular septa. These images were demonstrated to be useful for noninvasive assessment of interstitial pulmonary edema. Similarly, the correlation between implantable defibrillator-measured intrathoracic impedance and pulmonary capillary wedge pressure (PCWP) was demonstrated in heart failure (HF) patients. The aims of this analysis were to assess the agreement between defibrillator-detected impedance decrease and the presence of ULCs, as well as to compare the performance of the impedance-detection algorithm and the ULCs assessment in predicting HF worsening. ⋯ These data demonstrate the correlation between intrathoracic impedance and the number of ULCs at chest ultrasound, and a good agreement between the defibrillator warning for fluid index and the detection of multiple ULCs.
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Pacing Clin Electrophysiol · Aug 2011
Prevalence of preexcitation in a young population of male Swiss conscripts.
Sudden cardiac death can be the first clinical presentation of asymptomatic ventricular preexcitation. Recent data about prevalence of preexcitation in the electrocardiograms (ECG) of the general population are scarce. ⋯ The prevalence of preexcitation in young, predominantly male conscripts is 0.13%. This is comparable with previous findings in children.