How can too much sugar affect the heart?

Sugar: Heart Disease: Excessive and rapid intake of sugar, as occurs when drinking sugared drinks, causes Insulin spikes which cause the lining of blood vessels to form plaques (blockages) that cause the organ to malfunction eg heart attack, heart failure, stroke, kidney failure, leg pain &nerve damage. Low glygemic index foods release sugar slower, so the blocking effect is limited.

Different ways: Our metabolism wasnt designed for it. The pancreas has to release extra Insulin & may fatigue, risking diabetes. The Insulin drives sugar into storage (weight gain), lowers blood sugar, causing more cravings, a kind of addiction. High Insulin & sugar may cause inflammation which promotes vascular disease. Obesity also raises heart risks. Complex carbs (fruit, veg, whole grains) are much healthier.