good cardiac doctors in yelahanka Obesity significantly increases the risk of sudden cardiac arrest (SCA) by contributing to structural heart changes, such as left ventricular hypertrophy, and metabolic dysfunctions like hypertension and diabetes. While obesity is a major risk factor for cardiovascular disease and fatal arrhythmias, some studies suggest a complex 'obesity paradox' where obese patients may have better in-hospital survival rates, despite lower out-of-hospital survival.