Why did johnny cash have heart surgery?

Johnny Cash underwent heart surgery primarily due to complications related to his long-standing health issues, including a history of cardiovascular problems. In 2000, he was diagnosed with a condition that required him to have an angioplasty and later, a pacemaker implanted. His health challenges were exacerbated by years of lifestyle choices, including high-stress levels and a history of substance abuse. The surgeries aimed to improve his overall heart function and quality of life.