Hello! Thank you for asking on HCM! Regarding your concern, I would explain that your father s pain doesn t seem to be of ischemic cardiac origin. So relax! Nevertheless, I would recommend a medical check up to differentiate the cause of his complains. A careful physical exam, resting ECG, chest X ray study, complete blood count, PCR, AST & ALT, bilirubin, abdominal ultrasound, even cardiac ultrasound, etc are necessary for a comprehensive differential diagnosis. Possible causes like, pleural or pericardial inflammation, backbone discs degeneration, herpes Zoster, gallbladder calculus, thoracic wall structure involvements (intercostal muscle & costochondral joints implications, etc), should be taken into consideration. Meanwhile, a painkiller drug would be helpful to relieve the pain. Hope to have been helpful! Greetings! Dr. Iliri