$$\text{Tissue Damage} \propto \text{Volume of Refluxate} \times \text{Duration of Exposure}$$

$$\text{Pepsin Activation} \rightarrow \text{pH} \u003c 2$$

Question 1

Which of the following is the most common pathophysiologic mechanism contributing to GERD?

Accepted Answer

Transient relaxation of the lower esophageal sphincter (LES)

Question 2

A patient presents with substernal pain after meals, regurgitation, and belching. Which category of GERD symptoms does this presentation best fit?

Accepted Answer

Typical symptoms

Question 3

Which of the following foods is most likely to decrease LES tone and aggravate GERD symptoms?

Accepted Answer

Peppermint

Question 4

A patient with GERD develops difficulty swallowing and weight loss. What is the most concerning possible complication?

Accepted Answer

Esophageal stricture or malignancy

Question 5

Which medication class is most effective for long-term suppression of gastric acid in GERD?

Accepted Answer

Proton-pump inhibitors

Question 6

A patient with GERD is found to have squamous to columnar epithelial transformation in the distal esophagus. What is this condition called?

Accepted Answer

Barrett's esophagus

Question 7

Which of the following factors does NOT typically decrease LES tone?

Accepted Answer

High-fiber foods

Question 8

Which equation best represents the relationship between acid exposure and tissue damage in GERD?

Accepted Answer

$$	ext{Tissue Damage} \propto 	ext{Volume of Refluxate} 	imes 	ext{Duration of Exposure}$$

Question 9

Which of the following is a pulmonary manifestation of GERD?

Accepted Answer

Asthma

Question 10

A patient with diabetes and obesity is at increased risk for GERD due to which pathophysiologic mechanism?

Accepted Answer

Delayed gastric emptying and increased abdominal pressure

Question 11

Which of the following is TRUE regarding saliva in the context of GERD?

Accepted Answer

Saliva contains bicarbonate and growth factors that help neutralize acid and repair tissue

Question 12

Which lifestyle modification is LEAST likely to help reduce GERD symptoms?

Accepted Answer

Wearing tight clothing

Question 13

Which of the following medications may worsen GERD by decreasing LES tone?

Accepted Answer

Diazepam

Question 14

A patient with GERD has a hiatal hernia. What is the primary effect of this anatomical change?

Accepted Answer

Impairs esophageal clearance and alters LES integrity

Question 15

Which of the following is a severe or alarm symptom in GERD that may indicate malignancy?

Accepted Answer

Odynophagia (pain when swallowing)

Question 16

Which of the following statements about Barrett's esophagus is correct?

Accepted Answer

It is characterized by squamous to columnar epithelial transformation

Question 17

Which of the following best explains why the presence of bile acids in refluxate increases the risk of Barrett's esophagus?

Accepted Answer

Bile acids increase the severity of mucosal injury, promoting metaplasia

Question 18

Which of the following equations best describes the activation of pepsin in the context of GERD?

Accepted Answer

$$	ext{Pepsin Activation} ightarrow 	ext{pH} \u003c 2$$

Question 19

A patient with severe esophagitis is found to have impaired esophageal peristalsis. What is the likely consequence?

Accepted Answer

Increased acid contact time and more tissue damage

Gastroesophageal Reflux Disease (GERD): Anatomy, Physiology, and Pathophysiology

Study Guide - Practice Questions