GASTROESOPHAGEAL REFLUX
DISEASE
Dr Peltec Angela
GERD: MONTREAL DEFINITION
A condition which develops when the
reflux of stomach contents causes
troublesome symptoms and/or
complications
The Montreal definition and classification of GERD 2006
> 2 heartburn episodes/week
Adversely affect an individuals well
being
From Vakil N et al. Am J Gastroenterol 2006;101(8):1900-20.
ETIOLOGY
FACTORS ASSOCIATED WITH GERD
PATHOPHYSIOLOGY OF GERD
1. Anti-Reflux Barrier
2. Esophageal Contact Time
3. Gastric contents
PATHOGENESIS OF GERD
Decreased Salivation
Impaired Tissue
LES
Resistance
Hiatal Impaired Esophageal
Hernia Clearance
Decreased LES Resting
Tone
Duodenum
Delayed Gastric
Emptying
Bile
Reflux
PATHOPHYSIOLOGY OF GERD
ESOPHAGEAL ACID CONTACT
1. Impaired esophageal motility
- Dysfunctional peristalsis (aging)
- Poor emptying (hiatal hernia)
2. Salivary function
- Decreased salivation in sleep
- Cigarette use <60% saliva HCO3
PATHOPHYSIOLOGY OF GERD
GASTRIC REFLUXATE
Hydrochloric acid
40-70% Z-E patients have severe esophagitis
No difference in basal acid levels in GERD / esophagitis
Best treatment results with acid suppression Rx
Pepsin, bile, pancreatic enzymes
Can injure experimental esophagus tissue
Effects either limited by acid or too low concentration
Role of bile reflux in refractory GERD controversial
Acid rebound after PPI therapy
Effect of H. pylori eradication ???
GERD: CLINICAL FEATURES
TYPICAL SYMPTOMS
Common symptoms most common when pH<4
Heartburn
Belching and regurgitation
Hypersalivation
May be episodic or nocturnal
May be aggravated by meals and reclining
position
Extraesophageal manifestations of
GERD.
Otitis media Frequent throat clearing
Asthma Globus
Chronic sinusitis Tracheobronchitis
Dental erosions Chronic cough
Aphthous ulcers Aspiration pneumonia
Halitosis Pulmonary fibrosis
Pharyngitis Chronic bronchitis
Laryngitis Bronchiectasis
Laryngospasm Noncardiac chest pain
Postnasal drip Sleep apnea
"Alarm" signs that necessitate further evaluation of
GERD.
Dysphagia
Odynophagia
Weight loss
Gastrointestinal (GI) bleeding
Family history of upper GI tract cancer
Anemia
Advanced age
WORKUP
GERD DIAGNOSIS:
MENU
Empiric trial
Barium esophagram
Endoscopy
Manometry
pH testing
Impedance
EMPIRIC MEDICAL THERAPY
GUIDELINES FOR THE DIAGNOSIS AND
MANAGEMENT OF GERD 2013 AGA
A presumptive diagnosis of GERD can be established
in the setting of typical symptoms of heartburn
and regurgitation. Empiric medical therapy
with a proton pump inhibitor (PPI) is recommended
in this setting. (Strong recommendation, moderate
level of evidence)
Patients with non-cardiac chest pain suspected
due to GERD should have diagnostic evaluation
before institution of therapy. (Conditional
recommendation, moderate level of evidence).
A cardiac cause should be excluded in patients with
chest pain before the commencement of a
gastrointestinal evaluation (Strong recommendation,
low level of evidence)
BARIUM ESOPHAGRAM
GUIDELINES FOR THE DIAGNOSIS AND
MANAGEMENT OF GERD - 2013 AGA
Barium radiographs
should not be
performed to diagnose
GERD
(Strong recommendation,
high level of evidence)
ENDOSCOPY
MANAGEMENT OF GERD: ASGE
GUIDELINES
GERD despite therapy
Dysphagia
Odynophagia
Unexplained weight loss
GI bleeding/anemia
Choking
Chest pain
Mass, stricture or ulcer on imaging study
Recurrent symptoms after antireflux surgery
From Gastrointest Endosc 2007;66:219-24.
MANOMETRY
AGA ESOPHAGEAL GERD PRACTICE
GUIDELINES:
GERD despite therapy
Negative endoscopy
Goals:
LES location
Peristaltic function preoperatively
Detection of subtle motility abnormalities
High resolution manometry superior to conventional
manometry for achalasia variants & distal esophageal
spasm
Esophageal manometry is recommended for
preoperative evaluation, but has no role in the
diagnosis of GERD
From Kahrilas PJ et al. Gastroenterology
2008;135:1383-91.
24-HOUR ESOPHAGEAL PH
MONITORING
Most accurate test for
measuring pattern, frequency,
and duration of reflux episodes
Documents correlation between
reflux episodes and symptoms
Sensitivity (77-100%)
Normal in 25% of esophagitis!
Specificity 85-100%
Most useful when diagnosis still
unclear
Dent et al. Gut. 1999;44(suppl 2):S1-S16.
IMPEDANCE
In 1991 Silny was the first to describe multichannel
intraluminal impedance (MII), a novel method of detecting
intraesophageal bolus movement
This method is based on measuring the resistance to
alternating current (i.e., impedance) of the content of the
esophageal lumen
When a pair of electrodes, separated by an isolator (i.e.,
catheter), is placed inside the esophagus, the electrical
circuit is closed by electrical charges (i.e., ions) present in
the esophageal mucosa that surround the catheter
The conductivity of the empty esophageal lumen is
relatively stable, with the electrical circuit registering
values around 2000 to 4000 ohm
IMPEDANCE
COMBINED MULTICHANNEL INTRALUMINAL
IMPEDANCE AND PH CATHETER.
GI Motility online (May 2006) | doi:10.1038/gimo31
DIFFERENTIAL DIAGNOSIS
ALTERNATIVE DIAGNOSIS IN GERD
Coronary artery disease
Gallstones
Gastric /esophageal cancer
Peptic ulcer disease
Esophageal motility disorders
Pill induced esophagitis
Eosinophilic esophagitis
From Kahrilas PJ. N Engl J Med 2008;359:1700-7.
CLASSIFICATION
MONTREAL CLASSIFICATION OF GERD
From Vakil N et al. Am J Gastroenterol 2006;101:1900-20.
TREATMENT
THERAPY GOALS
Alleviateor eliminate
symptoms
Diminish the frequency of
recurrence and duration of
esophageal reflux
Promote healing if mucosa is
injured
Prevent complications
GUIDELINES FOR THE DIAGNOSIS AND
MANAGEMENT OF GERD - 2013 AGA
Weight loss is
recommended for GERD
patients who are
overweight or have had
recent weight gain.
(Conditional
recommendation, moderate
level of evidence)
DRUG THERAPY - ANTACIDS
Antacids with or without alginic acid
Antacids increase LES pressure and do not promote
esophageal healing
Neutralize gastric acid, causing alkalinization
Alginic acid (in Gaviscon) forms a highly viscous
solution that floats on top of the gastric contents
Dose as needed typical action 1-3 hours
Not best choice for nocturnal symptoms because pH
suppression cannot be maintained
Products: Magnesium salts, aluminum salts,
calcium carbonate, and sodium bicarbonate
Dosing: Initially 40-80 mEq
(no more than 500-600 mEq per 24 hours)
DRUG THERAPY H2RAS
Cimetidine Famotidine Nizatidine Ranitidine
Low dose 200 mg 10 mg 75 mg 75 mg
(qd to
bid)
Standard 400 mg 20 mg 150 mg 150 mg
dose (bid)
High 400 mg qid 40 mg bid 150 mg 150 mg
dose or 800 mg qid qid
bid
DRUG THERAPY - PPIS
Standard dosing
Esomeprazole 20 mg qd
Rabeprazole 20 mg qd (every day)
Pantoprazole 40 mg qd
Lansoprazole 15-30 mg qd
Omeprazole 20 mg qd
Timing
Best is 30 minutes prior to breakfast
DRUG THERAPY - PROKINETICS
Prokinetic Agents
Enhances motility of smooth muscle from
esophagus through the proximal small bowel
Accelerates gastric emptying and transit of
intestinal contents from duodenum to ileocecal
valve
Results of therapy
Improved gastric emptying
Enhanced tone of the lower esophageal sphincter
Stimulated esophageal peristalsis (cisapride
Drug Therapy Mucosal Protectants
Sucralfate
Very limited value in treatment of GERD
Comparisons
Similar healing rate to H2RA in treatment of mild esophagitis
Less effective than H2RAs in refractory esophagitis
Only use in mildest form of GERD
Esophageal mucosal
resistance:
Esophageal Alginic acid,
clearance:
Sucralfate
Cisapride
Gastric emptying: LES pressure:
Metoclopramide Metoclopramide
Cisapride
Cisapride
Gastric
acid:
Antacids
H2RAs
PPIs
http://www.gerd.com/intro/noframe/grossovw.htm
SURGICAL THERAPY FOR GERD
Nissen Fundiplication
Surgical Reconstruction of Esophageal
Hiatus
COMPLICATIONS OF GERD
COMPLICATIONS
Esophagitis
Esophageal strictures and ulcers
Hemorrhage
Perforation
Aspiration
Development of Barretts esophagus
Precipitation of an asthma attack
BARRETTS ESOPHAGUS
Barretts Oesophagus (BO) is a premalignant
condition of the oesophagus defined as the
presence of metaplastic columnar
epithelium,which endoscopically appears as
salmon pink mucosa, extending above the gastro-
oesophageal junction (GOJ) and into the tubular
oesophagus, thereby replacing the stratified
squamous epithelium that normally lines the
distal oesophagus.
Vakil N, van Zanten SV, Kahrilas P, Dent J, Jones R, Global Consensus Group. The
Montreal definition and classification of gastroesophageal reflux disease: a global evidence-
based consensus. Am J Gastroenterol 2006 Aug;101(8):1900-20;
Shaheen NJ, Richter JE. Barrett's oesophagus. Lancet 2009 Mar 7;373(9666):850-61
Diagrammatic representation of
endoscopic Barretts Oesophagus
showing an area classified as C2M5.
C: extent of circumferential
metaplasia; M: maximal extent of
the metaplasia (C plus a distal
tongue of 3 cm); GEJ:
gastroesophageal junction.
HIATAL HERNIA
HIATAL HERNIA
ACALASIA
ACALASIA
ACALASIA
ESOPHAGITIS
