title: Can we hear ventricle dyssynchrony? Yes, we can.
abstract: This study introduces a method for detection of ventricular depolarization activity and the transfer of this activity into an audible stereo audio signal. Heart potentials are measured by an ultra-high-frequency high-dynamic-range electrocardiograph (UHF-ECG) with a 25-kHz sampling rate. Averaged and prolonged UHF amplitude envelopes of V1-3 and V4-6 leads at a frequency range of 500-1000 Hz are used as a modulating function for two carrier audio frequencies. The right speaker makes it possible to listen to the depolarization of the septum and right ventricle (V1-3) and the left speaker the left ventricle lateral wall (V4-6). In the healthy heart, both speakers can be heard simultaneously. A delayed L or R speaker represents the dyssynchronous electrical activation of the ventricles. Examples of the normal heart, right bundle branch block and left bundle branch block can be heard at www.medisig.com/uhfecg.
authors.forename: P
authors.initials: P
authors.lastname: Jurak
authors.forename: J
authors.initials: J
authors.lastname: Halamek
authors.forename: F
authors.initials: F
authors.lastname: Plesinger
authors.forename: T
authors.initials: T
authors.lastname: Reichlova
authors.forename: V
authors.initials: V
authors.lastname: Vondra
authors.forename: I
authors.initials: I
authors.lastname: Viscor
authors.forename: P
authors.initials: P
authors.lastname: Leinveber
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D016276:Ventricular Function / Q000502:physiology*