the invention provides a disposable sensor patch for non - invasive monitoring and recording of infrequent cardiac events . the patch is thin and flexible for comfortable wear on the person &# 39 ; s chest for automatic analysis and recording of ecg . the patch is inexpensive and simple for self - administration . the patch incorporates a battery , ecg amplifier , and a processor for analyzing ecg waveform and recording events . a software algorithm searches for a cardiac abnormality . the patch is designed for continuous long - term wear exceeding 3 days for diagnostic monitoring and exceeding 14 days for event detection . in one embodiment a preformatted report is automatically generated by the patch for wireless transmission to a reporting device such as a generic printer or a wireless network system . the patch may also incorporate a marker switch to correlate recorded ecg data with the patient &# 39 ; s perception of a cardiac event .