[Initial and final changes in the signal-averaged QRS in the time and frequency domain in a case of hypertrophic myocardiopathy].
We report on a patient suffering from asymmetrical hypertrophic cardiomyopathy, with alterations occurring in the signal-averaged electrocardiogram (SAQRS). Recordings of 3-lead orthogonal ECG were obtained and analyzed by a Del Mar Avionics 750A Innovator device. The time domain analysis showed late potentials and a slow inscription of the initial portion of the SAQRS, that we called "early potentials". On the frequency domain there was a high degree of spectral turbulence at the beginning and at the end of the SAQRS. We discuss the possibility that the slow and fragmented conduction of the initial portion of the SAQRS could be related to the electrical instability of the disease.
Istituto di Medicina Clinica, Università di Padova.
B
B
Canciani
P
P
Mormino
G
G
Scanavacca
F
F
Della Rocca
D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D002312:Cardiomyopathy, Hypertrophic / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged
Alterazioni iniziali e finali del "signal-averaged" QRS nel dominio del tempo e nel dominio della frequenza in un caso di miocardiopatia ipertrofica.