Patent ID: 8731647

Claim:
A system for analyzing the cardiac activity of a patient comprising means ( 2 ) for acquiring at least one cardiac electric signal comprising at least one elementary signal ( 1 ) corresponding to a heart beat, means for extracting from said elementary signal ( 1 ), at least one elementary wave (P, Q, R, S, T), the general shape of which may be expressed by x(t)=x 0 +x 1 cos(Φ(t)), wherein Φ(t) is the phase of said elementary wave (P, Q, R, S, T), and means ( 9 ) for analyzing said elementary wave (P, Q, R, S, T), characterized in that the means ( 9 ) for analyzing said elementary wave (P, Q, R, S, T) comprise: means ( 9 ) for determining an expression of a phase equation F ⁡ ( Φ ) = ⅆ Φ ⅆ t of said elementary wave (P, Q, R, S, T); and means ( 9 ) for determining an expression of the phase Φ(t) of said elementary wave (P, Q, R, S, T) as a function of parameters (r, r k , Φ 0 , p k ) measuring the anharmonicity of said elementary wave (P, Q, R, S, T) and its morphology, from p cos n and p sin n functions defined by: p ⁢ ⁢ cos n ⁡ ( t , r ) = ∑ k = 1 ∞ ⁢ cos ⁡ ( k ⁢ ⁢ t ) ⁢ r k k n ⁢ ⁢ and ⁢ ⁢ p ⁢ ⁢ sin n ⁡ ( t , r ) = ∑ k = 1 ∞ ⁢ sin ⁡ ( k ⁢ ⁢ t ) ⁢ r k k n .