Hypertension

  1. What is hypertension?

    • Hypertension is a syndrome with multiple causes leading to persistently high blood pressure.

  2. What are the two main types of hypertension?

    • Essential (Primary) Hypertension and Secondary Hypertension.

  3. How is essential hypertension defined?

    • Hypertension with no identifiable cause, though subsets with distinct mechanisms are emerging.

  4. What distinguishes secondary hypertension from essential hypertension?

    • It has a specific, identifiable cause, such as kidney disease or hormonal disorders.

  5. Why is hypertension considered a complex syndrome?

    • It involves multiple mechanisms, varies by individual, and requires ongoing research for better classification.

  1. What is considered normal blood pressure?

    • Systolic <120 mmHg and Diastolic <80 mmHg.

  2. What blood pressure values define hypertension?

    • Systolic >140 mmHg or Diastolic >90 mmHg on at least three consecutive visits.

  3. What is pre-hypertension?

    • A systolic pressure between 120-139 mmHg or diastolic between 80-89 mmHg.

  4. How does blood pressure change with age?

    • Systolic pressure rises throughout life, while diastolic pressure rises until 50-60 years of age, then declines.

  5. Why is pulse pressure important in aging?

  • Pulse pressure increases with age due to the progressive rise in systolic pressure and decline in diastolic pressure.

  1. What is the most common cause of hypertension?

  • Increased peripheral vascular resistance.

  1. What conditions can cause increased blood volume leading to hypertension?

  • Mineralocorticoid excess and renal failure.

  1. How does blood viscosity contribute to hypertension?

  • Increased viscosity raises arterial pressure by making it harder for blood to flow.

  1. What is the fundamental equation for blood pressure regulation?

  • BP = Total Peripheral Resistance × Cardiac Output.

  1. What role does the renin-angiotensin-aldosterone system (RAAS) play in hypertension?

  • It regulates blood volume and vascular resistance, significantly impacting blood pressure.

  1. Why is hypertension known as the "silent killer"?

  • It often has no symptoms but causes severe complications over time.

  1. What are the major cardiovascular complications of hypertension?

  • Myocardial infarction and heart failure.

  1. What neurological conditions can result from hypertension?

  • Thrombotic stroke, hemorrhagic stroke, and hypertensive encephalopathy.

  1. How does hypertension affect the kidneys?

  • It can cause renal failure due to increased pressure damaging kidney tissues.

  1. What symptoms indicate hypertensive encephalopathy?

  • Confusion, disordered consciousness, and seizures due to cerebral edema.

  1. What are early physical signs of hypertension?

  • Often absent; symptoms appear in later stages.

  1. What retinal changes indicate advanced hypertension?

  • Hypertensive retinopathy, retinal hemorrhages, exudates, and papilledema.

  1. What cardiac changes occur due to long-term hypertension?

  • Left ventricular hypertrophy and potential heart failure.

  1. What renal signs may be observed in severe hypertension?

  • Renal artery bruits due to turbulent blood flow.

  1. What condition results from an extreme acceleration of hypertension?

  • Malignant hypertension.

  1. What is the main focus of modern hypertension treatment?

  • Controlling systolic hypertension, especially in older adults.

  1. What is the risk of overly aggressive diastolic pressure reduction?

  • It may cause coronary perfusion problems, especially in heart disease patients.

  1. What are the first-line medications for treating hypertension?

  • Beta-blockers, ACE inhibitors, ARBs, calcium channel blockers, and diuretics.

  1. What is the role of plasma renin measurement in hypertension management?

  • It helps determine whether hypertension is driven by vasoconstriction or volume expansion.

  1. What is the preferred treatment for hypertension with high renin levels?

  • RAAS inhibitors such as ACE inhibitors or ARBs.

  1. What condition results from congenital narrowing of the aorta?

  • Coarctation of the aorta.

  1. Why does coarctation of the aorta lead to high blood pressure?

  • It increases resistance above the narrowing, causing systemic hypertension.

  1. What is salt sensitivity in hypertension?

  • A condition where blood pressure is significantly affected by sodium intake.

  1. What populations have a higher prevalence of salt-sensitive hypertension?

  • African Americans and individuals with essential hypertension.

  1. How does obesity contribute to hypertension?

  • Through increased sympathetic activity, insulin resistance, and sodium retention.

  1. How does excess aldosterone cause hypertension?

  • It increases sodium and water retention, raising blood volume.

  1. How does cortisol excess lead to high blood pressure?

  • It enhances sodium retention and vascular sensitivity to vasoconstrictors.

  1. What condition results from adrenal tumors producing catecholamines?

  • Pheochromocytoma.

  1. How does estrogen influence blood pressure?

  • It increases angiotensinogen levels, which raises blood pressure.

  1. What role does nitric oxide (NO) play in blood pressure regulation?

  • NO is a vasodilator that reduces vascular resistance.

  1. Why is plasma renin-guided treatment beneficial?

  • It tailors treatment based on the patient’s specific hypertension mechanism.

  1. What dietary plan is recommended for managing hypertension?

  • The DASH diet (low sodium, high in fruits and vegetables).

  1. What lifestyle changes can help control hypertension?

  • Exercise, weight loss, reducing sodium intake, and stress management.

  1. What is the mechanism of beta-blockers in hypertension treatment?

  • They reduce heart rate and cardiac output by blocking adrenaline’s effects.

  1. What is the definition of a hypertensive crisis?

  • A blood pressure reading above 180/120 mmHg.

  1. Why is regular screening important for hypertension?

  • Because it is often asymptomatic and can cause severe complications if untreated.

  1. What is the primary risk of untreated hypertension?

  • Increased risk of heart attack, stroke, and kidney failure.

  1. What is the preferred treatment for volume-expanded hypertension?

  • Diuretics.

  1. Why do ACE inhibitors help lower blood pressure?

  • They prevent the conversion of angiotensin I to angiotensin II, a vasoconstrictor.

  1. What is the long-term goal of hypertension management?

  • Reducing complications and improving overall cardiovascular health.