1 of the component ea 2 hereinafter u201c ts u201d this indicator which corresponds to the duration of the systole is generally counted between the moment marking the beginning of the ea 1 component and the moment marking the beginning of the ea 2 component ep 2092885 a1 assigned to sorin crm s a s previously known as ela medical describes in detail techniques for analyzing an ea signal to among other things extract both pea 1 and ts information this document also describes a method by which these parameters may be determined as well as other characteristics of the ea 1 and ea 2 components in fig1 a series of records giving the value of pea 1 for heart rate fc experimentally obtained for a patient with regurgitation of the mitral valve before and after angioplasty is shown the a points correspond to records for a patient with severe regurgitation of the mitral valve and the b crosses are those obtained for the same patient after an angioplasty procedure which allowed to absorb any regurgitation of the mitral valve as can easily be seen the gradient of the peak amplitude pea 1 versus heart rate fc is much higher after the intervention e g after the specific pathology has disappeared this gradient and its modification are used to assess the patient 39 s condition as outlined below fig2 illustrates three timing diagrams of electrogram egm and endocardial acceleration ea signals experimentally identified on a healthy animal then with progressive occlusion of a coronary.