Course:PostgradFamilyPractice/ExamPrep/99 Priority Topics/Dyspepsia

Dyspepsia - Key Features

1. In a patient presenting with dyspepsia, include cardiovascular disease in the differential diagnosis.

2. Attempt to differentiate, by history and physical examination, between conditions presenting with dyspepsia (e.g., gastroesophageal reflux disease, gastritis, ulcer, cancer), as plans for investigation and management may be very different.

3. In a patient presenting with dyspepsia, ask about and examine the patient for worrisome signs/symptoms (e.g., gastrointestinal bleeding, weight loss, dysphagia).

Definition

• Chronic or recurrent pain or discomfort centered in the upper abdomen, “indigestion”

• Associated with bloating, early satiety, nausea, vomiting

• Can be intermittent, continuous, and may or may not be related to meals

• Prevalence: 25-50% in Western countries

Approach to Dyspepsia

Differential Diagnoses (Table 2, AFP)

• Functional (idiopathic, non-ulcer) (up to 70%)

• Peptic ulcer disease (gastroduodenal) (15-25%)

• Reflux esophagitis (5-15%)

• Gastric or esophageal cancer (<2%)

• Other differential diagnoses are rare:

• Abdominal cancer (esp pancreatic)

• Biliary tract disease

• CHO malabsorption

• Gastroparesis

• Hepatoma, etc.

Risk Factors

• Medications: ASA, NSAIDs (Table 3, AFP)

• EtOH and tobacco are potential triggers

• Emotional stress frequently associated with functional dyspepsia

Gastroesophageal Reflux Disease

• Most common condition to affect the esophagus

• Can range from heartburn with endoscopy-negative reflux disease to ulcers, stricture, Barrett's

• Everyone has some degree of GE reflux → Pathological when there are sx + complications

Pathophysiology

Reflux of gastric contents into the esophagus, can occur with and without hiatus hernia

Factors:

LES function, intra-abdominal pressure

Peristalsis, salivation, Mucosal defense

Clinical Features

Heartburn, acid regurgitation after eating certain foods or following various postural maneuvers

Waterbrash, angina-like chest pain, dysphagia, respiratory symptoms, odynophagia rare

Common in pregnancy (↑intra-abdominal pressure and LES relaxant effect of progesterone)

If severe, stricture formation → wt loss (↓intake)

Aspiration: consolidation, bronchospasm, fibrosis

Diagnosis mostly via history and physical

Investigations reserved to answer following:

Amount of reflux abnormal?

Symptoms due to reflux?

Mucosal damage or other complications?

Patients with long-standing GERD → endoscopy

5-10% will have Barrett's (if > 5y of symptoms)

If young, typical and infrequent symptoms → empiric therapy

Treatment

Lifestyle Modifications

Elevate head of bed, Quit smoking, Avoid recumbency for 3h after eating

Avoid trigger foods/drinks, Losing weight

Acid suppression: antacids, alginates, H2RA, PPI

Refractory Symptoms → endoscopy

Pregnancy: antacids, alginates, cimetidine

Oral Acid Suppressants

Helicobacter pylori Infection

• Most common gastric bacterial infection worldwide, Prevalence: 20-30% in Western world

• Most H. pylori-infected individuals have associated gastritis, although many have no symptoms

• Associated with increasing risk of PUD, gastric cancer, gastric MALT lymphoma

• Antral gastritis → atrophic gastritis + intestinal metaplasia → gastric cancer

• Risk factors: Immigration from a developing country, low SES, family overcrowding

Testing

* Serology: unable to differentiate active from past infection. Will remain positive for several years following successful treatment.
** UBT, endoscopic gastric biopsy, fecal antigen testing may be affected by medications such as antibiotics and acid lowering agents → hold bismuth and antibiotics x 28d and PPI for 7-14d prior to testing.

H. pylori Eradication

• Small but statistically significant improvement in functional dyspepsia symptoms

• Decreases risk of PUD and its complications

• NNT=15 for relief of symptoms

• Cost-effectiveness unknown

Prokinetics for Functional Dyspepsia

• Target patients with predominant symptoms of bloating, early satiation, nausea, and vomiting

• Aim: improve GI motility

• Domperidone, metoclopramide, erythromycin, peppermint

• Evidence poor

Study Guide

Dyspepsia

References

Loyd, RA et al. Update on the evaluation and management of functional dyspepsia. Am Fam Physician. 2011; 83(5): 547-552.
First Principles of Gastroenterology
Uptodate: Approach to patient with dyspepsia
McMaster Module on Dyspepsia
BC Guidelines: Dyspepsia
BC Guidelines: GERD