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Results: Twenty-one patients presented positive VLP and 13 patients showed negative VLP. Parameters of VLP (fQRSd, RMS40, LAS40) presented significant correlation with the alteration to a type-1 ECG by pilsicainide. VLP demonstrated high sensitivity and negative predictive value for the prediction of type-1 Brugada ECG. Furthermore, in their follow-up, at least two cases of ventricular fibrillation were recognized in 21 of positive VLP patients with apparently normal ECGs. Conclusions: VLP in apparently normal ECG can predict the alteration to a drug-induced type-1 Brugada ECG and unmask the patients at risk. (PACE 2010; 33:266�C273) ""Background:Heart rate recovery (HRR) and chronotropic incompetence (CI) in patients with subclinical hypothyroidism (SCH) has not been explored previously. The aim of the present study was to evaluate the HRR and CI in patients http://www.selleckchem.com/products/dabrafenib-gsk2118436.html with SCH. Methods:Twenty-five patients (11 men, 14 women with a mean age of 36 �� 10 years) who were diagnosed SCH determined by an increased serum thyrothrophine (TSH) concentration (>4.0 ng/mL) and the normal free triiodothyronine (fT3) and free thyroxin (fT4) levels, were included in the study. http://www.selleckchem.com/products/sch772984.html The control group of healthy individuals with normal TSH (12 males, 15 females) with a mean age of 36 �� 3 years was also included. Two groups were well matched for age, sex, and body mass index. Medical history, physical examination, electrocardiogram, treadmill exercise testing, and chest radiogram were performed for all participants. Results:The characteristics of SCH patients and control cases were similar with regard to http://www.selleck.cn/products/ly2157299.html age, sex, and BMI except for TSH levels. Serum TSH levels were significantly higher in SCH patients than the controls (P