Body worn physiological sensor device having a disposable electrode module

An ECG monitor comprising:

• a plurality of electrical connections including at least one electrode, the electrical connections being couplable to a skin surface to measure patient heartbeat signals;
• a power source;
• at least one current-limiting defibrillation protection resistor, the at least one current-limiting defibrillation protection resistor comprising a resistor screened onto a substrate;
• and
• an ECG electronics module, the ECG electronics module receiving and processing patient heartbeat signals from the plurality of electrical connections,
• wherein the at least one current-limiting defibrillation protection resistor is electrically disposed between at least one of the plurality of electrical connections and the ECG electronics module.