SPIROCOR Coronary Outcome by Respiratory Stress Examination

Inclusion Criteria: * Subject with suspected S-CAD * Subject able to perform the guided breathing protocol and comply with study requirements * Subject is able and agrees to sign the informed consent form Exclusion Criteria: * Resting (supine) ECG evidence of ST-segment depression ≥ 1 mm in any lead or left bundle branch block or significant arrhythmia * Current digoxin therapy * Subject has severe valvular heart disease * Subject has congestive heart failure NYHA class III/IV * Subject has known history of myocardial infarction (ST elevation or non ST elevation) * Subject had previous coronary revascularization: CABG or PCI * Subject has pacemaker or ICD that controls sinus * Morbidly obese subject (BMI ≥ 40) * Subject has any significant medical condition which, at the investigator's discretion, may interfere with the subject's optimal participation in the study; and * Subject is currently participating in another investigational product clinical study that the investigator believes may interfere with the outcome of this study