Hello Welcome to HCM. Your mother sustained a heart attack and she was given blood thinning medication to break the clot which caused the heart attack. After an heart attack, the heart muscle gets damaged. This leads to irritability of heart muscle and hence it starts producing extra beats leading to ventricular tachycardia in some patients. Also as the heart muscle gets damaged, the pumping function of heart also decreases leading to decreased blood supply to vital organs and fluid congestion in the lungs. This decreased pumping function along with ventricular tachycardia causes complications. Patients can go on the ventilator and need medication support for LOW BP. I assume your mother is suffering from above issues and hence is in life support. She should be on two blood thinning medications, diuretics (water pill), cholesterol lowering medications (statins) , anticoagulants like heparin or clexane , drugs for ventricular tachycardia like lignocaine or amiodarone and other supportive medications. The ventilatory support must be continued till she starts breathing on herself and lung congestion gets better. The other life support medications also are continued to her body responds well. The prognosis is guarded since she is requiring life support. They may also suggest an angiography and angioplasty to evaluate and treat blockages in the heart. Wishing her good health. Regards