Selections of Subjects With Important Changes in Their Cardiac Repolarization Parameters for the Procurement of Skin and Blood Samples (iQTEST)

Inclusion Criteria:

• 18 to 40 years of age
• Caucasian origin
• BMI 19 to 29 kg/m²
• Informed Consent obtained
• National Health Security Number
• Eligible for Phase I as mentioned in the national registry of healthy volunteers
• For woman: use of an effective contraceptive method

Non Inclusion Criteria:

• Asthma
• Heart Rate < 50 bpm
• Hypotension with systolic blood pressure< 100 mm Hg.
• atrioventricular block (PR interval > 200 ms)
• Known Chronic illness (hepatic, renal or cardiac impairment, etc..)
• Raynaud's phenomenon
• Drug known to prolong QT (http://www.azcert.org/medical-pros/drug-lists/drug-lists.cfm) in the last 7 days.
• All chronic treatments are forbidden exceptive : oral contraceptives, paracetamol, vitamins and comfort treatment that do not prolong the QT
• Known family or individual past history of QT prolongation or unexplained syncope
• (QTcF) > 450 ms
• QRS interval non assessable on ECG at rest or bundle-branch block, QRS > 100 ms
• Allergy to macrolide type antibiotics
• Known allergy to sotalol or lidocaine
• Positive blood pregnancy test (Inclusion visit)
• Known abnormal haemostasis
• Kaliemia< 3.5 mmol/L
• Magnesemia< 0,7 mmol/L
• Under exclusion period or participating to another clinical trial on a new medicinal product
• Creatinin clearance < 80 ml/min (Cockroft and Gault formula)
• AST-ALT >3x upper normal limit