Hi thanks for contacting HCM... Noted your partener having chest pain and dyspnea.... So here heart problem chances are more... You are mentioning positive clot blood report.... So it is better to rule out pulmonary embolism or coronary artery disease.... ECG and 2 D echo will be useful for it.... 2D echo should be performed by cardiologist to visualization emboli.... D dimer estimation also done... If pulmonary embolism present then heparin needed... If cardiac cause not present then respi cause like COPD or interstitial lung disease rule out by chest x ray and spirometry.... Take care.... Dr.Parth