Measurement of the Electromechanical Window to Improve the Diagnosis of Congenital Long QT Syndrome

"A standard ECG is recorded along with a phonocardiographic recording. The phonocardiographic recording is obtained by using a specific electronic stethoscope plugged into the auxiliary port of the ECG machine. The recording takes less than 30 seconds. The two recording methods are concomitant.~QT interval is measured on the ECG recording, EMW is measured with ECG coupled to phonocardiography."