Abstract: A non-invasive, programmable cardio-respiratory monitoring system for performing automated autonomic nervous system function tests by monitoring and analyzing EKG signals in relation to specific paced breathing and/or posture regimens, and immediately computing and disclosing the test results automatically upon completion of one or all of the tests. The accuracy of these tests, which are currently being performed manually and/or with multiple components, is greatly improved bt the invention's capability to issue automated audio-visual instructions to the patient, to analyze any major peak of the QRS complex for determining heart rate variation, to discriminate between normal and abnormal EKG signals, and to edit the automated test results to enhance the validity of the test results.