Wearable medical system to monitor a patient parameter

A wearable medical system, comprising:

• a support structure configured to be worn by the person;
• a monitoring device configured to monitor a plurality of physiological parameters of the person, wherein the plurality of physiological parameters include an electrocardiogram (ECG) reading of the person and a pulse reading of the person;
• an electrode coupled to the support structure;
• an energy storage device configured to store an electric charge, and to deliver the electric charge to the person through the electrode in response to a shockable event based at least in part on the plurality of physiological parameters indicating the shockable event.

A method to operate a wearable medical system, comprising:

• monitoring at least one physiological parameter of a person wearing the wearable medical system, wherein the at least one physiological parameter includes an electrocardiogram (ECG) reading of the person;
• in response to the at least one physiological parameter meeting a threshold value, causing a biasing mechanism to transition from an unbiased state to a biased state, wherein an electrode of the wearable medical system is in loose contact with a body of the person when the biasing mechanism is in the unbiased state, and the electrode is in electrical contact with the body of the person when the biasing mechanism is in the biased state;
• and
• charging a capacitor of the wearable medical system to a lower energy level in response to biasing the electrode to the biased state in preparation for a sudden discharge of an electric charge to the person through the electrode.