gastroesophageal reflux disease rajeev jain, md november 27, 2006
TRANSCRIPT
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Gastroesophageal Gastroesophageal Reflux DiseaseReflux Disease
Rajeev Jain, MDRajeev Jain, MD
November 27, 2006November 27, 2006
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GERD
OutlineOutline
DefinitionDefinition EpidemiologyEpidemiology PathophysiologyPathophysiology DiagnosisDiagnosis TreatmentTreatment ManagementManagement
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GERD
Vakil N, et al. Am J Gastroenterol 101(8):1900-20.2006.
DefinitionDefinition
No gold standardNo gold standard Montreal DefinitionMontreal Definition
– “ “a condition which develops when a condition which develops when the reflux of stomach contents the reflux of stomach contents causes troublesome symptoms causes troublesome symptoms and/or complications”and/or complications”
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GERD
ClassificationClassification
EndoscopyEndoscopy– Erosive esophagitisErosive esophagitis
Los Angeles classificationLos Angeles classification
– Non-erosive reflux disease (NERD) or Non-erosive reflux disease (NERD) or endoscopy negative reflux disease (ENRD)endoscopy negative reflux disease (ENRD)
SymptomsSymptoms– EsophagealEsophageal– Extra-esophagealExtra-esophageal
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GERD
LA ClassificationLA ClassificationLA
Gra
de A
LA G
rade
B
LA G
rade
C
LA G
rade
D
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GERD
EpidemiologyEpidemiology
PrevalencePrevalence– Symptoms in western populationsSymptoms in western populations
25% monthly25% monthly 12% weekly12% weekly 5% daily5% daily
IncidenceIncidence– 1.5 – 3% develop weekly GERD per yr1.5 – 3% develop weekly GERD per yr
Moayyedi P, Axon ATR. Aliment Pharmacol Ther 22(S1):11-9.2005.
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GERD
Risk FactorsRisk Factors
DemographicDemographic– Age & gender not a major differenceAge & gender not a major difference
Lifestyle & EnvironmentalLifestyle & Environmental– Obesity, EtOH, & tobacco have weak Obesity, EtOH, & tobacco have weak
associations (OR 1.5 – 2.5) associations (OR 1.5 – 2.5) 11
– H. pyloriH. pylori has no impact has no impact 22
GeneticGenetic– Higher concordance in mono- than Higher concordance in mono- than
dizygotic twins dizygotic twins 11
1. Moayyedi P & Talley NJ. Lancet 367:2086-100.2006.
2. Raghunath AS, et al. Aliment Pharmacol Ther 20:733-44.2004.
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GERD
PathophysiologyPathophysiology
Primary mechanism – impaired function Primary mechanism – impaired function of the lower esophageal sphincter (LES)of the lower esophageal sphincter (LES)
In most patients with GERD, exposure In most patients with GERD, exposure of the esophagus to refluxate is greater of the esophagus to refluxate is greater than normalthan normal
In a minority of patients, exposure is In a minority of patients, exposure is within normal limits; in these patients, within normal limits; in these patients, GERD may be due to decreased GERD may be due to decreased mucosal resistance to refluxate mucosal resistance to refluxate
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GERD
Mechanisms of Acid Mechanisms of Acid RefluxReflux
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GERD
Ineffective Ineffective peristalsisperistalsis
Reduced salivary Reduced salivary secretionsecretion
Reduced secretion Reduced secretion from esophageal from esophageal submucosal glandssubmucosal glands
Defective Esophageal Defective Esophageal ClearanceClearance
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GERD
Inappropriate Inappropriate and prolonged and prolonged transient transient relaxationsrelaxations
Reduction in Reduction in basal LES basal LES pressure/tonepressure/tone
LES ‘dysfunction’LES ‘dysfunction’
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GERD
Substances that Substances that Decrease LES PressureDecrease LES Pressure
HormonesHormones– SecretinSecretin– CholecystokininCholecystokinin– GlucagonGlucagon– SomatostatinSomatostatin– ProgesteroneProgesterone
FoodsFoods– FatFat– ChocolateChocolate– EthanolEthanol– PeppermintPeppermint
MedicationsMedications
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GERD
-adrenergic -adrenergic agonistsagonists
TheophyllineTheophylline AnticholinergicsAnticholinergics Tricyclic Tricyclic
antidepressantsantidepressants
-adrenergic -adrenergic antagonistsantagonists
DiazepamDiazepam Calcium channel Calcium channel
blockersblockers
Medications that Medications that Decrease LES PressureDecrease LES Pressure
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GERD
May trap a May trap a reservoir of reservoir of gastric contents gastric contents above the above the diaphragm, diaphragm, increasing refluxincreasing reflux
May compromise May compromise LES functionLES function
Hiatal HerniaHiatal Hernia
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GERD
PregnancyPregnancy ObesityObesity BendingBending StrainingStraining CoughingCoughing Tight clothesTight clothes
Increased Increased Intra-abdominalIntra-abdominal PressurePressure
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GERD
May result in an May result in an increase in the increase in the volume of gastric volume of gastric contents available contents available for reflux into the for reflux into the esophagusesophagus
Exact role in GERD Exact role in GERD remains to be remains to be clarifiedclarified
Delayed Gastric Delayed Gastric EmptyingEmptying
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GERD
Diagnostic MethodsDiagnostic Methods
HistoryHistory EndoscopyEndoscopy Empiric therapyEmpiric therapy pH monitoring pH monitoring RadiologyRadiology
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GERD
HistoryHistory
History taking is the primary diagnostic History taking is the primary diagnostic ‘tool’ for GERD‘tool’ for GERD– Heartburn – sensation of discomfort or Heartburn – sensation of discomfort or
burning behind the sternum rising up to the burning behind the sternum rising up to the neckneck
– Regurgitation – effortless return of gastric Regurgitation – effortless return of gastric contents into the pharynxcontents into the pharynx
Accuracy of symptoms when compared Accuracy of symptoms when compared to endoscopy as gold standard to endoscopy as gold standard – Sensitivity 30-76%Sensitivity 30-76%– Specificity 45-68%Specificity 45-68%
Moayyedi P, et al. JAMA 295:1566-76.2006.
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GERD
Allows direct visualization Allows direct visualization of the esophageal mucosa of the esophageal mucosa and biopsy if necessaryand biopsy if necessary
Presence and severity of Presence and severity of erosive esophagitiserosive esophagitis
Detection of complications Detection of complications such as stricture or such as stricture or Barrett’s esophagusBarrett’s esophagus
DeVault et al. Am J Gastroenterol 1999
EndoscopyEndoscopy
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GERD
Advances in Advances in EndoscopyEndoscopy
Ultra-thin endoscopesUltra-thin endoscopes– Transnasal or oralTransnasal or oral– No sedationNo sedation
Magnification endoscopyMagnification endoscopy Capsule endoscopyCapsule endoscopy
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GERD
Referral for EndoscopyReferral for Endoscopy
Chronic symptoms requiring Chronic symptoms requiring continuous acid-suppression therapycontinuous acid-suppression therapy
Persistent suspected GERD symptoms Persistent suspected GERD symptoms that fail to respond to acid suppressionthat fail to respond to acid suppression
Any new GERD patient over the age of Any new GERD patient over the age of 4040
Warning signs:Warning signs:– Weight lossWeight loss– Anemia or BleedingAnemia or Bleeding– DysphagiaDysphagia
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GERD
Empiric TherapyEmpiric TherapyPPI TestPPI Test
Logical as GERD is an acid-related Logical as GERD is an acid-related disorderdisorder
Normal or high-dose PPI for 1-4 Normal or high-dose PPI for 1-4 wks in the diagnosis of GERD wks in the diagnosis of GERD (gold (gold standard was 24 hr ambulatory pH study)standard was 24 hr ambulatory pH study)
–Sensitivity 78% (95% CI 66-86%)Sensitivity 78% (95% CI 66-86%)–Specificity 54% (95% CI 44-65%)Specificity 54% (95% CI 44-65%)
Numans ME, et al. Ann Intern Med 140:518-27.2006.
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GERD
Allows investigation of:Allows investigation of:– the amount and timing of refluxthe amount and timing of reflux– the correlation between reflux and the correlation between reflux and
symptomssymptoms– the effect of therapy on refluxthe effect of therapy on reflux
In general, most useful in:In general, most useful in:– endoscopy-negative patientsendoscopy-negative patients– patients with chest pain or patients with chest pain or
pulmonary/upper respiratory pulmonary/upper respiratory symptomssymptoms
– patients with refractory symptomspatients with refractory symptoms
pH MonitoringpH Monitoring
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GERD
pH MonitoringpH Monitoring
24 hr pH 24 hr pH monitoringmonitoring– single best testsingle best test– 50-60% will 50-60% will
have have abnormalitiesabnormalities
– new device:new device: BRAVO probeBRAVO probe 48 hr monitoring48 hr monitoring
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GERD
pH MonitoringpH Monitoring
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GERD
1Dent et al. Gut 1999
Now considered to be of Now considered to be of very limited practical value very limited practical value in the diagnosis of GERDin the diagnosis of GERD11
May be helpful in the May be helpful in the detection of subtle detection of subtle strictures and hiatal hernias strictures and hiatal hernias in patients with dysphagiain patients with dysphagia
May be helpful in May be helpful in identifying pathologies identifying pathologies unrelated to GERDunrelated to GERD
Barium EsophagramBarium Esophagram
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GERD
Richter. Am J Gastroenterol 2000
Misc
Asthma
ENT
Chest pain
Non-erosive reflux disease
Erosive esophagitis
Yes
No
Need to investigate role of acid
0%
100%
Prevalence of GERD
The Pyramid of Diseases The Pyramid of Diseases Associated with GERD Associated with GERD
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GERD
EsophagealEsophageal–Barrett’s Barrett’s esophagusesophagus
–adenocarcinoadenocarcinomama
–stricturestricture–ulcerationulceration–bleedingbleeding
Extra-Extra-esophagealesophageal–asthmaasthma–reflux laryngitisreflux laryngitis–vocal cord ulcersvocal cord ulcers–subglottic subglottic stenosisstenosis
–tracheal stenosistracheal stenosis
Complications of GERD Complications of GERD
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GERD
Esophageal strictureEsophageal stricture
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GERD
Barrett’s EsophagusBarrett’s Esophagus
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GERD
1Lagergren et al. New Engl J Med 1999
Barrett’s Esophagus Barrett’s Esophagus Clinical SignificanceClinical Significance
Premalignant lesion for Premalignant lesion for esophageal adenocarcinomaesophageal adenocarcinoma
Patients with Barrett’s esophagus Patients with Barrett’s esophagus may be 30–60 times more likely to may be 30–60 times more likely to develop this cancer than the develop this cancer than the general populationgeneral population11
The reported incidence of The reported incidence of Barrett’s esophagus is risingBarrett’s esophagus is rising
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GERDThe Risk of Esophageal The Risk of Esophageal Adenocarcinoma Increases Adenocarcinoma Increases
with:with:
Frequency of Frequency of reflux symptomsreflux symptoms– OR 16.7 with > 3/wkOR 16.7 with > 3/wk
Duration of reflux Duration of reflux symptomssymptoms– OR 16.4 with greater OR 16.4 with greater
than 20 yrsthan 20 yrs
Severity of reflux Severity of reflux symptomssymptoms– OR 20 with most OR 20 with most
severe scoresevere score
Lagergren et al. N Engl J Med 1999
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TreatmentTreatment
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GERD
Treatment OptionsTreatment Options
Lifestyle measuresLifestyle measures
Pharmacological therapyPharmacological therapy– Initial therapyInitial therapy–Maintenance therapyMaintenance therapy
Antireflux surgeryAntireflux surgery
Endoscopic techniquesEndoscopic techniques
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GERD
Lifestyle MeasuresLifestyle Measures
Raise the head of the bed, or lie on Raise the head of the bed, or lie on left sideleft side
Decrease fat intakeDecrease fat intake Avoid certain foodsAvoid certain foods Avoid lying down for 3 hours after Avoid lying down for 3 hours after
eatingeating Stop smokingStop smoking Lose weight if appropriateLose weight if appropriate
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GERD
Aggravating Dietary Aggravating Dietary FactorsFactors
Caffeinated Caffeinated productsproducts
PeppermintPeppermint Fatty foodsFatty foods ChocolateChocolate
Spicy foodsSpicy foods Citrus fruits and Citrus fruits and
juicesjuices Tomato-based Tomato-based
productsproducts AlcoholAlcohol
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GERD
Pharmacological TherapyPharmacological Therapy
AntacidsAntacids ProkineticsProkinetics Acid suppressionAcid suppression
–Histamine 2-receptor antagonists Histamine 2-receptor antagonists (H(H22RAs)RAs)
–Proton pump inhibitors (PPIs)Proton pump inhibitors (PPIs)
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GERD
Acid SuppressionAcid SuppressionErosive Esophagitis – Initial TherapyErosive Esophagitis – Initial Therapy
HH22RA v placebo (4-8 wks of therapy)RA v placebo (4-8 wks of therapy)– 18 trials, 2134 patients18 trials, 2134 patients– NNT 5 (95% CI, 3-22)NNT 5 (95% CI, 3-22)
PPI v placeboPPI v placebo– 5 trials, 635 patients5 trials, 635 patients– NNT 2 (95% CI, 1.4-2.5)NNT 2 (95% CI, 1.4-2.5)
PPI v HPPI v H22RARA– 26 trials, 4064 patients26 trials, 4064 patients– NNT 3 (95% CI, 2.8-3.6)NNT 3 (95% CI, 2.8-3.6)
Khan M, et al. Cochrane Database Syst Rev.2006.
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GERD
Acid SuppressionAcid SuppressionErosive Esophagitis – Maintenance Erosive Esophagitis – Maintenance
TherapyTherapy
80% relapse after 6-12 months off 80% relapse after 6-12 months off therapytherapy
PPI v HPPI v H22RARA– 10 trials, 1583 patients, 24-52 wks 10 trials, 1583 patients, 24-52 wks
of therapyof therapy– Relapse rateRelapse rate
22% in PPI group22% in PPI group 58% in H58% in H22RA groupRA group
– NNT 2.5 (95% CI, 2.0-3.4)NNT 2.5 (95% CI, 2.0-3.4)
Donnellan C, et al. Cochrane Database Syst Rev.4:2004.
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GERD
Antireflux Surgery – Antireflux Surgery – ProceduresProcedures
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GERD
1DeVault et al. Am J Gastroenterol 19992Dent et al. Gut 1999
Antireflux Surgery – Antireflux Surgery – use and efficacyuse and efficacy
Antireflux surgery is an option as Antireflux surgery is an option as maintenance therapy for patients with maintenance therapy for patients with well documented GERDwell documented GERD11
The efficacy of antireflux surgery is The efficacy of antireflux surgery is similar to that of chronic PPI therapysimilar to that of chronic PPI therapy22
The outcome of surgery is highly The outcome of surgery is highly dependent on the skill and experience dependent on the skill and experience of the surgeonof the surgeon22
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GERD
Endoscopic TherapyEndoscopic Therapy
Three FDA approved techniquesThree FDA approved techniques–Stretta: radiofrequency therapy to Stretta: radiofrequency therapy to LESLES
–EndoCinch: endoscopic EndoCinch: endoscopic gastroplicationgastroplication
–Enteryx: 8% ethylene vinyl alcohol Enteryx: 8% ethylene vinyl alcohol copolymercopolymer
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GERD
Endoscopic Endoscopic GastroplicationGastroplication
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GERD
ManagementManagementGoalsGoals
Provide complete relief from Provide complete relief from heartburn and other symptomsheartburn and other symptoms
Heal underlying erosive esophagitisHeal underlying erosive esophagitis
Treat or prevent complicationsTreat or prevent complications
Prevent recurrencePrevent recurrence
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GERD
ManagementManagement
Clinical diagnosisClinical diagnosis Endoscopy in pts with alarm Endoscopy in pts with alarm
symptomssymptoms PPI once daily taken 30 min before PPI once daily taken 30 min before
breakfast for 4-8 weeksbreakfast for 4-8 weeks If symptoms resolve, consider on-If symptoms resolve, consider on-
demand therapy or step downdemand therapy or step down Relapse is commonRelapse is common
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GERD
ManagementManagement
If symptoms persist despite daily PPIIf symptoms persist despite daily PPI– NonadherenceNonadherence– Inadequate dosing or timingInadequate dosing or timing– Nocturnal acid breakthroughNocturnal acid breakthrough– RareRare
Zollinger-Ellison syndromeZollinger-Ellison syndrome Drug resistanceDrug resistance
Surgery – right patient and right Surgery – right patient and right surgeonsurgeon
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