Changes in cardiac output or blood oxygen monitor stress may be of worth in diagnosis and administration chronic and/or recurring illness states (e.g., congestive heart failure, hypertension, syncope). Current is transmitted by means of the chest and seeks the trail of least resistance, i.e., the blood filled aorta. With every heartbeat, the blood quantity and velocity of the aorta change. Impedance plethysmography measures the corresponding change in impedance and calculates the hemodynamic parameters. Embodiments of the current invention are directed to a physiological monitoring system which is configured to record indicators that mirror blood move and/or blood stress, and which may also document ECG indicators. An instance of clinical use is the evaluation of people experiencing syncope (faints) of unknown origin. AC current with an electrical discipline to detect native electrical impedance of a portion of the patient's physique encompassed by the electrical field, the native electrical impedance being a surrogate measure of local blood flow of the portion of the patient's physique. At the very least a portion of the portable monitoring system is configured to be insertable subcutaneously into the patient's physique.

ECG electrodes are configured to be coupled to the affected person's physique. Auxiliary leads are coupled with the impedance electrodes. ECG electrodes are can-mounted surface electrodes. Auxiliary leads might even be coupled with at least some of the impedance electrodes and the ECG electrodes. AC present with an electrical discipline to detect native electrical impedance of a portion of the patient's body encompassed by the electrical discipline, the local electrical impedance being a surrogate measure of native blood circulate of the portion of the affected person's physique