A portable electrocardiography (ECG) device includes a first pair of first type snap-in buttons at a first plane of a case. The first type snap-in buttons are configured for coupling to ECG electrodes having a second type snap-in button. The portable ECG device also includes a processor in electrical connection with the first pair of first type snap-in buttons. The processor is configured for monitoring and processing electrocardiography signals obtained by the ECG electrodes.
