Patent ID: 7794406

Claim:
A method for diagnosis, comprising: receiving from a sensor coupled to a body of a patient a photoplethysmograph signal, which is indicative of blood flow in the body; extracting, using a processor, from the photoplethysmograph signal waveforms that are indicative of a cycle of the blood flow, identifying, using a processor, an aberrant waveform among the extracted waveforms, and analyzing, using a processor, the shape of the aberrant waveform so as to identify at least one irregularity in a heart rhythm of the patient, wherein said extraction, said identification and said analysis are based on said photoplethysmograph signal, devoid of any input from ECG leads; making a record, using a processor, indicating a time of occurrence of the at least one irregularity; and processing, using a processor, the record so as to diagnose a pathological cardiac condition of the patient.