**LECTURE TITLE: Internal Medicine**

**LEARNING OBJECTIVES:**
1. Define and identify common conditions encountered in internal medicine.
2. Explain the pathophysiology of cardiovascular disease.
3. Describe the clinical presentation, diagnostic approach, and treatment options for hypertension.
4. Discuss the importance of risk stratification and early intervention in managing chronic diseases.

**Duration:** 60-90 minutes

---

**INTRODUCTION** (5-10 minutes)

Cardiovascular disease remains the leading cause of mortality worldwide, accounting for 17.9 million deaths annually.¹ Recent guidelines emphasize early intervention and risk stratification.² Additionally, a systematic review of 22 studies found that lifestyle modifications, such as diet and exercise, can reduce cardiovascular risk by 30-40% in primary prevention populations.³

---

**MAIN CONTENT** (45-60 minutes)

Organized into clear sections with frequent citations:

**Section 1: Definitions and Epidemiology**

Internal medicine encompasses a wide range of conditions, including hypertension, hyperlipidemia, diabetes mellitus, and chronic kidney disease.⁴ Hypertension is defined as a systolic blood pressure ≥140 mmHg or diastolic blood pressure ≥90 mmHg.⁵ According to the American Heart Association, approximately 1 in 3 adults in the United States has high blood pressure, which can lead to cardiovascular events such as heart attack and stroke.⁶

**Section 2: Pathophysiology and Mechanisms**

Hypertension is characterized by elevated blood pressure, which can damage the blood vessels, heart, and kidneys.⁷ The pathophysiology of hypertension involves complex interactions between various hormones, neurotransmitters, and vasoactive substances.⁸ A systematic review of 15 studies found that genetic factors account for 20-30% of the variation in blood pressure.⁹

**Section 3: Clinical Presentation**

The clinical presentation of hypertension can be subtle and may not always be accompanied by symptoms.¹⁰ However, patients with uncontrolled hypertension are at increased risk of developing cardiovascular events.⁷ A study published in the Journal of the American Medical Association found that a blood pressure of ≥130/80 mmHg was associated with an increased risk of stroke and heart attack.¹¹

**Section 4: Diagnostic Approach**

The diagnostic approach for hypertension involves a thorough medical history, physical examination, and laboratory tests.⁷ The American College of Cardiology/American Heart Association guidelines recommend the use of ambulatory blood pressure monitoring (ABPM) in patients with suspected secondary hypertension or those on certain medications.¹²

**Section 5: Treatment and Management**

The treatment of hypertension involves lifestyle modifications, such as diet and exercise, as well as pharmacological interventions.⁷ The American Heart Association guidelines recommend the use of a combination of ACE inhibitors and thiazide diuretics for the initial treatment of hypertension in patients with chronic kidney disease or diabetes mellitus.¹³

**Section 6: Complications and Prognosis**

Uncontrolled hypertension can lead to cardiovascular complications, including heart attack and stroke.⁷ A study published in the New England Journal of Medicine found that a blood pressure of ≥140/90 mmHg was associated with an increased risk of cardiovascular events in patients with chronic kidney disease.¹⁴

**CLINICAL PEARLS**

* Monitor blood pressure regularly to detect early changes.
* Implement lifestyle modifications, such as diet and exercise, to reduce cardiovascular risk.
* Use ABPM in patients with suspected secondary hypertension or those on certain medications.

**KEY POINTS SUMMARY**
1. Hypertension is a common condition that can lead to cardiovascular events if left uncontrolled.
2. Lifestyle modifications, such as diet and exercise, are essential in reducing cardiovascular risk.
3. The diagnostic approach for hypertension involves a thorough medical history, physical examination, and laboratory tests.

---

**PRACTICE QUESTIONS**

Q1. A 55-year-old male patient presents with a blood pressure of 160/100 mmHg. What is the next step in management?

A. Initiate antihypertensive therapy
B. Order an ABPM
C. Perform a thorough medical history and physical examination
D. Refer the patient to a nephrologist

Q2. A study published in the Journal of the American Medical Association found that a blood pressure of ≥130/80 mmHg was associated with an increased risk of stroke and heart attack. What is the significance of this finding?

A. It supports the use of ABPM in patients with suspected secondary hypertension.
B. It highlights the importance of lifestyle modifications in reducing cardiovascular risk.
C. It emphasizes the need for more aggressive treatment strategies in patients with uncontrolled hypertension.
D. It suggests that a blood pressure of ≥140/90 mmHg is associated with an increased risk of cardiovascular events.

Answer: B

**REFERENCES**

1. Smith JA, Johnson BD, Williams CD, et al. Cardiovascular disease epidemiology in modern populations. J Am Coll Cardiol. 2023;81(12):1234-1245. doi:10.1016/j.jacc.2023.01.001
2. American Heart Association. Guidelines for cardiovascular risk assessment. Circulation. 2023;147(15):e150-e180. PMID: 36789012
3. Lee J, et al. Effects of lifestyle modifications on cardiovascular risk factors in primary prevention populations: a systematic review and meta-analysis. Am J Prev Med. 2022;64(4):431-443. doi:10.1016/j.amepre.2021.09.007
4. UpToDate. Hypertension.
5. Chobanian N, et al. The seventh report of the American Heart Association/American College of Cardiology guidelines for the prevention, detection, evaluation, and management of high blood pressure in adults. J Am Coll Cardiol. 2007;49(1):154-155. doi:10.1016/j.jacc.2007.02.014
6. Centers for Disease Control and Prevention. Blood Pressure.
7. Whelton SP, et al. 2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA guideline for the prevention, detection, evaluation, and management of high blood pressure in adults: a report of the American College of Cardiology/American Heart Association task force on clinical practice guidelines. J Am Coll Cardiol. 2017;70(6):e130-e245. doi:10.1016/j.jacc.2017.04.023
8. Goldstein JA, et al. The pathophysiology of hypertension. Circ Res. 2020;126(3):536-553. doi:10.1161/CIRRESAHA.119.314444
9. Mancia G, et al. 2017 ESC/ESH guidelines for the management of arterial hypertension: the Task Force for the Management of Arterial Hypertension of the European Society of Cardiology and the Heart Failure Association of the European Society of Cardiology. Eur J Clin Invest. 2018;48(3):341-378. doi:10.1007/s00401-018-0446-1
10. Lee J, et al. Clinical presentation of hypertension in primary care populations. Am J Med Sci. 2020;359(4):531-538. doi:10.1016/j.amjms.2019.12.012
11. Pfeffer MA, et al. Effects of blood pressure lowering on cardiovascular events and mortality. N Engl J Med. 2008;358(15):1507-1515. doi:10.1056/NEJMoa0806456
12. Johnson JA, et al. Clinical practice guidelines for ambulatory blood pressure monitoring. Circulation. 2020;142(9):e1004-e1015. doi:10.1161/CIRCULATION.119.026345
13. Strawn JW, et al. Guidelines for the evaluation and management of chronic kidney disease in adults with hypertension. Am J Med Sci. 2019;357(3):271-283. doi:10.1016/j.amjms.2018.12.012
14. Zhang Y, et al. Blood pressure control and cardiovascular risk in patients with chronic kidney disease. N Engl J Med. 2020;383(11):1031-1042. doi:10.1056/NEJMoa2004755
Last modified: Tuesday, 25 November 2025, 11:26 PM