However, the most common cause of a decreased heart function is coronary artery disease and may lead to heart failure eventually. Obesity is a severe threat to your life, especially with a BMI of 41.2 (obesity class III). Sleep apnea is a common problem with obese people, but I would also test your cholesterol and perform a stress ECHO to check you for Pulmonary Hypertension.
In addition, I would strongly recommend life style changes, diet & exercise. This is the time; you are still young enough to make a change for the better!
You can read more here:
Chest pains:
https://www.cardiachealth.org/ca-blog/chest-pain/
Heart failure:
https://www.cardiachealth.org/heart-information/heart-failure
Lisinopril:
https://www.cardiachealth.org/heart-disease-treatment/heart-disease-med
Obesity:
https://www.cardiachealth.org/heart-information/obesity
https://www.cardiachealth.org/ca-blog/when-is-overweight-dangerous/
Pulmonary Hypertension:
https://www.cardiachealth.org/ca-blog/pulmonary-hypertension-is-it-dang
https://www.cardiachealth.org/ca-blog/pulmonary-hypertension-and-morbid
https://www.cardiachealth.org/ca-blog/i-had-an-echocardiogram-that-show
What you can do:
https://www.cardiachealth.org/heart-disease-treatment/what-you-can-do
You can calculate your risks here:
https://www.cardiachealth.org/risks-benefits/cardiovascular-risk
Hope this helps,
Dr T