Welcome to HCM,
Your mother is having Mitral valve prolapse
and she had chest pain which subsided with Pantoprazole that means it was probably due to acid peptic disorder.
Her ECG and 2 D Echocardiography
confirmed Mitral Valve Prolapse which can cause chest pain this defect is detected now but present from birth, usually benign condition and can be treated symptomatically and if required a low dose Beta blocker
may be useful.
Take care of Lipid profile
with diet and exercise and statin consult a Cardiologist
Stop any pan or Tobacco use.
Remember TMT may come false positive so let cardiologist decide if coronary artery disease is suspected then CT Angiography or catheter angiography will be done.
Please take care
Dr. Akhilesh Dubey M.D.