A wearable monitoring device for monitoring an intrabody region of the lungs of a patient during a stress ergometry procedure and/or stress exercise, comprising: at least one wearable probe comprising at least one transducer configured for transmitting continuous wave electromagnetic radiation to and intercepting EM radiation from at least one intrabody region of the lungs of a patient while said patient is performing a stress examination test; characterized by: a processing unit configured for: computing differential signals by sensing a change over time of said intercepted EM radiation, wherein pre-recorded measurements of changes in the dielectric coefficient of pulmonary tissue during at least one breathing cycle or during the systolic and diastolic phases of a cardiac cycle are used as a reference to compute the differential signals; calculating a dielectric related change of the intrabody region during the stress examination test based on the change, and diagnosing coronary abnormalities according to said dielectric related change of pulmonary tissues which is detected during said stress examination test relative to a calibration stage before the stress examination is initiated; and an output unit configured for outputting a notification indicating said coronary abnormalities. at least one wearable probe comprising at least one transducer configured for transmitting continuous wave electromagnetic radiation to and intercepting EM radiation from at least one intrabody region of the lungs of a patient while said patient is performing a stress examination test; characterized by: a processing unit configured for: computing differential signals by sensing a change over time of said intercepted EM radiation, wherein pre-recorded measurements of changes in the dielectric coefficient of pulmonary tissue during at least one breathing cycle or during the systolic and diastolic phases of a cardiac cycle are used as a reference to compute the differential signals; calculating a dielectric related change of the intrabody region during the stress examination test based on the change, and diagnosing coronary abnormalities according to said dielectric related change of pulmonary tissues which is detected during said stress examination test relative to a calibration stage before the stress examination is initiated; and an output unit configured for outputting a notification indicating said coronary abnormalities. a processing unit configured for: computing differential signals by sensing a change over time of said intercepted EM radiation, wherein pre-recorded measurements of changes in the dielectric coefficient of pulmonary tissue during at least one breathing cycle or during the systolic and diastolic phases of a cardiac cycle are used as a reference to compute the differential signals; calculating a dielectric related change of the intrabody region during the stress examination test based on the change, and diagnosing coronary abnormalities according to said dielectric related change of pulmonary tissues which is detected during said stress examination test relative to a calibration stage before the stress examination is initiated; computing differential signals by sensing a change over time of said intercepted EM radiation, wherein pre-recorded measurements of changes in the dielectric coefficient of pulmonary tissue during at least one breathing cycle or during the systolic and diastolic phases of a cardiac cycle are used as a reference to compute the differential signals; calculating a dielectric related change of the intrabody region during the stress examination test based on the change, and diagnosing coronary abnormalities according to said dielectric related change of pulmonary tissues which is detected during said stress examination test relative to a calibration stage before the stress examination is initiated; and an output unit configured for outputting a notification indicating said coronary abnormalities.