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#Diabetes #VascularDisease #Hyperglycemia #Atherosclerosis #PAD #CAD #Stroke #Amputation #GlycemicControl
This video deep dive explores diabetes, a **chronic condition of high blood sugar**, defining it as either insufficient insulin (type 1) or, more commonly, insulin resistance where cells don’t respond properly (type 2). Globally, prevalence has nearly quadrupled, affecting around 425 million people currently, projected to rise significantly, driven partly by sedentary lifestyles and high-calorie food availability. In the US, about **10.5% of the population (34 million people)** have diabetes, with another **88 million having prediabetes**, a major risk factor for developing type 2. Disparities exist, with higher rates among American Indian/Alaska Natives, Hispanics, and non-Hispanic blacks. The economic burden is substantial, totalling an estimated **$327 billion in the US** (2017), with medical costs two to three times higher for those with diabetes. Sadly, it’s linked to around **270,000 deaths annually** in the US.
The main long-term damage centres on blood vessels, affecting both small (microvascular) and large (macrovascular) vessels. Microvascular issues include **retinopathy (20x higher risk of blindness)** and **nephropathy (25x higher risk of kidney failure)**. Macrovascular damage is primarily due to accelerated **atherosclerosis** (plaque buildup). This significantly increases the risk and severity of **Peripheral Artery Disease (PAD)**, **Coronary Artery Disease (CAD – the leading cause of diabetes-related death)**, and **Cerebrovascular Disease (CVD/Stroke)**. People with diabetes face a doubled stroke risk and worse functional outcomes after a stroke. **PAD is much more common**, affecting up to 40%, tends to affect distal arteries, and accounts for roughly **60% of non-traumatic lower limb amputations**.
Damage involves endothelial dysfunction, a procoagulant state, and chronic inflammation. Evaluation includes foot exams (checking for neuropathy with tests like the monofilament) and blood flow tests like ABI (though toe pressures may be needed due to calcification). Management involves aggressive risk factor modification – focusing on blood sugar, blood pressure (lower than 130/80mmHg target), and cholesterol (statins are key). Glycemic control aims for an HbA1c typically around 7%, as very intensive control hasn’t shown macrovascular benefit in trials and can increase risk. Newer medications like GLP-1 agonists and SGLT-2 inhibitors offer cardiovascular benefits. Preventative foot care is crucial. Antiplatelet therapy is complex, particularly for primary prevention. Exercise is the first-line treatment for claudication. Revascularization is reserved for disabling pain or critical limb ischemia. The video highlights the surprising findings on intensive glycemic control and the complex, multi-system nature of diabetes.
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