Method and device for motion and noise immunity in hemodynamic measurement

A method of selecting an appropriate anti-arrhythmia therapy for a patient according to a hemodynamic status of the patient, comprising:

• monitoring electrical activity of the patient's heart to detect an arrhythmia;
• monitoring hemodynamic performance of the heart, said monitoring comprising:
• measuring a parameter indicative of hemodynamic performance during a first state to establish a template waveform,
• obtaining an autocharacterization measure for the template waveform by cross-characterizing the template waveform with itself,
• measuring the parameter indicative of hemodynamic performance during a second state to establish a test waveform,
• performing a cross-characterization between the template waveform and the test waveform to identify a cross-characterization measure,
• comparing the cross-characterization measure with the autocharacterization measure to obtain a comparison result, and
• obtaining an indication of hemodynamic status based on the comparison result;
• and
• selecting, based on said indication of hemodynamic status, the appropriate anti-arrhythmia therapy to treat the arrhythmia.