Management of gastroesophageal reflux disease in primary care settings in Spain: SYMPATHY I study

Lower pH values of weakly acidic refluxes as determinants of heartburn perception in gastroesophageal reflux disease patients with normal esophageal acid exposure

Multichannel impedance pH monitoring has shown that weakly acidic refluxes are able to generate heartburn. However, data on the role of different pH values, ranging between 4 and 7, in the generation of them are lacking. The aim of this study was to evaluate whether different pH values of weakly acidic refluxes play a differential role in provoking reflux symptoms in endoscopy-negative patients with physiological esophageal acid exposure time and positive symptom index and symptom association probability for weakly acidic refluxes. One hundred and forty-three consecutive patients with gastroesophageal reflux disease, nonresponders to proton pump inhibitors (PPIs), were allowed a washout from PPIs before undergoing: upper endoscopy, esophageal manometry, and multichannel impedance pH monitoring. In patients with both symptom index and symptom association probability positive for weakly acidic reflux, each weakly acidic reflux was evaluated considering exact pH value, extension, physical characteristics, and correlation with heartburn. Forty-five patients with normal acid exposure time and positive symptom association probability for weakly acidic reflux were identified. The number of refluxes not heartburn related was higher than those heartburn related. In all distal and proximal liquid refluxes, as well as in distal mixed refluxes, the mean pH value of reflux events associated with heartburn was significantly lower than that not associated. This condition was not confirmed for proximal mixed refluxes. Overall, a low pH of weakly acidic reflux represents a determinant factor in provoking heartburn. This observation contributes to better understand the pathophysiology of symptoms generated by weakly acidic refluxes, paving the way toward the search for different therapeutic approaches to this peculiar condition of esophageal hypersensitivity.

Esophageal baseline impedance levels in patients with pathophysiological characteristics of functional heartburn

BACKGROUND

Recently, it has been suggested that low esophageal basal impedance may reflect impaired mucosal integrity and increased acid sensitivity. We aimed to compare baseline impedance levels in patients with heartburn and pathophysiological characteristics related to functional heartburn (FH) divided into two groups on the basis of symptom relief after proton pump inhibitors (PPIs).

METHODS

Patients with heartburn and negative endoscopy were treated with esomeprazole or pantoprazole 40 mg daily for 8 weeks. According to MII-pH (off therapy) analysis, patients with normal acid exposure time (AET), normal reflux number, and lack of association between symptoms and refluxes were selected; of whom 30 patients with a symptom relief higher than 50% after PPIs composed Group A, and 30 patients, matched for sex and age, without symptom relief composed Group B. A group of 20 healthy volunteers (HVs) was enrolled. For each patient and HV, we evaluated the baseline impedance levels at channel 3, during the overnight rest, at three different times.

KEY RESULTS

Group A (vs Group B) showed an increase in the following parameters: mean AET (1.4 ± 0.8% vs 0.5 ± 0.6%), mean reflux number (30.4 ± 8.7 vs 24 ± 6.9), proximal reflux number (11.1 ± 5.2 vs 8.2 ± 3.6), acid reflux number (17.9 ± 6.1 vs 10.7 ± 6.9). Baseline impedance levels were lower in Group A than in Group B and in HVs (p < 0.001).

CONCLUSIONS & INFERENCES

Evaluating baseline impedance levels in patients with heartburn and normal AET could achieve a better understanding of pathophysiology in reflux disease patients, and could improve the distinction between FH and hypersensitive esophagus.

Proton pump inhibitor responders who are not confirmed as GERD patients with impedance and pH monitoring: who are they?

BACKGROUND

A short-course of proton pump inhibitors (PPIs) is often used to confirm gastroesophageal reflux disease (GERD). However, some patients with PPI responsive heartburn do not seem to have evidence of GERD on impedance-pH monitoring (MII-pH). The aim of the study was to evaluate patients with reflux symptoms and a negative endoscopy, who well respond to PPIs with MII-pH.

METHODS

We enrolled 312 patients with GERD symptoms and negative endoscopy: 144 reported well-controlled symptoms after 8-week PPIs and 155 were non-responders. Symptom relief was evaluated with GERD Impact Scale and visual analog scale score. All patients underwent MII-pH off-therapy. Thirteen patients were excluded from analysis. Patients were grouped as follows: non-erosive reflux disease (NERD; increased acid exposure time, AET); hypersensitive esophagus (HE; normal AET, positive symptom association, SI/SAP); MII-pH-/PPI+ (normal AET, negative SI/SAP) in the responder group; MII-pH-/PPI- in non-responders.

KEY RESULTS

MII-pH in PPI responders (symptom relief during PPI therapy > 75%) showed: 79/144 NERD (54.9%); 37/144 HE (25.7%); 28/144 MII-pH-/PPI+ (19.4%). MII-pH-/PPI+ patients reported the same symptom relief when compared with NERD and HE. In non-responder (symptom relief during PPI therapy < 50%) group, 27/155 patients were NERD (17.4%); 53/155 were HE (34.2%); 75/155 were MII-pH-/PPI- (48.4%). NERD diagnosis was significantly higher in responder group (p < 0.01).

CONCLUSIONS & INFERENCES

In a substantial subgroup of patients responding to PPI with typical reflux symptoms, the diagnosis of GERD cannot be confirmed with pH-impedance monitoring. Proton pump inhibitor response and presence of typical symptoms are thus not reliable predictors of the diagnosis and antireflux surgery should always be preceded by reflux monitoring.

Acid reflux episodes sensitize the esophagus to perception of weakly acidic and mixed reflux in non-erosive reflux disease patients

BACKGROUND

Non-erosive reflux disease (NERD) patients are more sensitive than erosive esophagitis patients to weakly acidic reflux and to the presence of gas in the refluxate. Intra-esophageal acid perfusion sensitizes esophageal receptors to mechanical and chemical stimuli.

METHODS

To establish whether acid sensitization plays a role in the perception of weakly acidic and mixed reflux episodes, 29 NERD patients, responders and 14 non-responders to proton pump inhibitors (PPIs), underwent pH-impedance monitoring. Non-responders repeated the study while on PPIs. To assess the effect of acid exposure on symptom perception, the time period with pH below 4 was measured in 15- and 30-minute time-windows preceding the onset of each reflux episode.

KEY RESULTS

Considering weakly acidic and mixed refluxes, both in responder and non-responder patients (off PPIs), the symptomatic refluxes were preceded by a significantly higher cumulative acid exposure than the asymptomatic refluxes. In all patients, following acid reflux, the percentage of symptomatic weakly acidic reflux episodes was significantly higher than that of asymptomatic refluxes. Non-responder patients, off-treatment, were characterized by a lower proportion of weakly acidic reflux and mixed reflux episodes. In the non-responder patients on PPI, only mixed and weakly symptomatic reflux episodes were preceded by a higher cumulative acid exposure.

CONCLUSIONS & INFERENCES

In NERD patients, spontaneous acid reflux enhances subsequent reflux perception, regardless of acidity or liquid/mixed composition of episodes; in non-responder patients on PPIs, only the perception of mixed and weakly acidic reflux episodes seems to be mediated by a preceding acid exposure.

Gastroesophageal reflux and sleep events in obstructive sleep apnea

OBJECTIVE

Gastroesophageal reflux disease (GERD) and obstructive sleep apnea (OSA) often coexist. We sought to determine the presence and direction of any association between GERD and sleep events in patients with OSA.

MATERIALS AND METHODS

We conducted a case-crossover study among 18 patients with known OSA and GERD. All study patients underwent overnight simultaneous polysomnography and esophageal pH monitoring. A series of case-crossover analyses was conducted by defining each of the sleep (i.e. arousal, awakening, and apnea) and gastroesophageal reflux (GER) events as the outcome in turn. Respective control time points were randomly selected in all eligible control periods. When a sleep event was the outcome, the GER event was the exposure of interest. When GER was the outcome, each sleep event was assessed as the exposure individually. Conditional logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs).

RESULTS

Both awakenings and arousals were significantly associated with the subsequent onset of a GER event. The OR for a GER event following an awakening was 5 (95% CI 3.6-6.9) and for a GER event following an arousal was 2.5 (95% CI 1.8-3.4). Apnea did not lead to GER (OR 1.0, 95% CI 0.8-1.4). GER was not more commonly observed before any of the sleep events compared with control periods without sleep events.

CONCLUSION

In patients with coexisting GERD and OSA, both awakening and arousal preceded GER events, but GER does not appear to precipitate sleep-related events.

A preliminary investigation of laparoscopic fundoplication treatment on gastroesophageal reflux disease-related respiratory symptoms

BACKGROUND

Extraesophageal syndromes are more difficult to identify and treat than the usual esophageal symptoms. The current study explores the efficacy of laparoscopic Nissen fundoplication (LNF) on gastroesophageal reflux disease (GERD)-related respiratory symptoms (RSs) during a 12-month follow-up observation.

METHODS

From April 2008 to September 2009, LNF was performed on 198 patients (107 men and 91 women) with GERD-related RSs according to underlying esophageal motility. A questionnaire form ranging from 0 to 5 was the basic requirement for recording pretreatment and posttreatment and for making detailed evaluation of the symptoms. All scores of GERD-related RSs, such as heartburn, regurgitation, coughing, breathe holding, wheezing, shortness of breath, and choking, significantly decreased at the 12th month.

RESULTS

All the patients who participated in the current study were adults and elders aged 22 to 84 years with a mean age of 49 ± 12.89. The median length of stay was 4.3 days with a range of 2 to 8 days. The median score of heartburn, regurgitation, coughing, wheezing, shortness of breath, choking, and chest pain decreased from 4.92 ± 1.99, 4.98 ± 1.81, 7.23 ± 1.87, 7.50 ± 1.88, 5.83 ± 2.13, 5.94 ± 2.22, and 4.92 ± 1.88 to 1.62 ± 2.33, 0.64 ± 1.43, 2.79 ± 2.82, 2.53 ± 2.96, 1.37 ± 2.10, 1.28 ± 2.09, and 1.57 ± 2.55 (P<0.01), respectively. A total of 173 patients had various relieved symptom scores, 16 patients (8.1%) had different scale recurrence of symptoms after laparoscopic fundoplication treatment, and 13 patients had to retreat to omeprazole as an auxiliary medical therapy. Three other patients rejected any therapy, and no deaths occurred. A single patient converted from laparoscopic surgery to open surgery. Several short-term symptoms included retrosternal uneasiness or pain (n = 63; 31.8%), dysphagia (n = 45; 22.7%), abdominal distension (n = 87; 43.9%), and diarrhea (n = 23; 11.6%). Early dysphagia lasting <6 weeks was common, and 45 patients (22.7%) underwent an early esophagogastroduodenoscopy or contrast swallow. Five patients (2.5%) who had prolonged dysphagia during the 6-month clinical review required esophageal dilatation, and the outcomes were successful.

CONCLUSIONS

LNF can be an effective means for treating RSs in patients with GERD.

How many cases of laryngopharyngeal reflux suspected by laryngoscopy are gastroesophageal reflux disease-related?

AIM: To investigate the prevalence of gastroesophageal reflux disease (GERD) in patients with a laryngoscopic diagnosis of laryngopharyngeal reflux (LPR).

METHODS: Between May 2011 and October 2011, 41 consecutive patients with laryngopharyngeal symptoms (LPS) and laryngoscopic diagnosis of LPR were empirically treated with proton pump inhibitors (PPIs) for at least 8 wk, and the therapeutic outcome was assessed through validated questionnaires (GERD impact scale, GIS; visual analogue scale, VAS). LPR diagnosis was performed by ear, nose and throat specialists using the reflux finding score (RFS) and reflux symptom index (RSI). After a 16-d wash-out from PPIs, all patients underwent an upper endoscopy, stationary esophageal manometry, 24-h multichannel intraluminal impedance and pH (MII-pH) esophageal monitoring. A positive correlation between LPR diagnosis and GERD was supposed based on the presence of esophagitis (ERD), pathological acid exposure time (AET) in the absence of esophageal erosions (NERD), and a positive correlation between symptoms and refluxes (hypersensitive esophagus, HE).

RESULTS: The male/female ratio was 0.52 (14/27), the mean age ± SD was 51.5 ± 12.7 years, and the mean body mass index was 25.7 ± 3.4 kg/m². All subjects reported one or more LPS. Twenty-five out of 41 patients also had typical GERD symptoms (heartburn and/or regurgitation). The most frequent laryngoscopic findings were posterior laryngeal hyperemia (38/41), linear indentation in the medial edge of the vocal fold (31/41), vocal fold nodules (6/41) and diffuse infraglottic oedema (25/41). The GIS analysis showed that 10/41 patients reported symptom relief with PPI therapy (P < 0.05); conversely, 23/41 did not report any clinical improvement. At the same time, the VAS analysis showed a significant reduction in typical GERD symptoms after PPI therapy (P < 0.001). A significant reduction in LPS symptoms. On the other hand, such result was not recorded for LPS. Esophagitis was detected in 2/41 patients, and ineffective esophageal motility was found in 3/41 patients. The MII-pH analysis showed an abnormal AET in 5/41 patients (2 ERD and 3 NERD); 11/41 patients had a normal AET and a positive association between symptoms and refluxes (HE), and 25/41 patients had a normal AET and a negative association between symptoms and refluxes (no GERD patients). It is noteworthy that HE patients had a positive association with typical GERD-related symptoms. Gas refluxes were found more frequently in patients with globus (29.7 ± 3.6) and hoarseness (21.5 ± 7.4) than in patients with heartburn or regurgitation (7.8 ± 6.2). Gas refluxes were positively associated with extra-esophageal symptoms (P < 0.05). Overall, no differences were found among the three groups of patients in terms of the frequency of laryngeal signs. The proximal reflux was abnormal in patients with ERD/NERD only. The differences observed by means of MII-pH analysis among the three subgroups of patients (ERD/NERD, HE, no GERD) were not demonstrated with the RSI and RFS. Moreover, only the number of gas refluxes was found to have a significant association with the RFS (P = 0.028 and P = 0.026, nominal and numerical correlation, respectively).

CONCLUSION: MII-pH analysis confirmed GERD diagnosis in less than 40% of patients with previous diagnosis of LPR, most likely because of the low specificity of the laryngoscopic findings.

[Symptom profile in gastroesophageal reflux disease in untreated patients and those with persistent symptoms despite treatment]

AIM

1. To analyze the symptom profile of gastroesophageal reflux disease (GERD) with typical clinical manifestations (heartburn and/or regurgitation); 2. to compare untreated patients with those with persistent symptoms despite treatment; 3. to evaluate severity according to physicians' and patients' opinions; and 4. to determine the diagnostic and therapeutic approaches used.

METHODS

We performed a prospective, observational, cross-sectional study under conditions of standard clinical practice.

RESULTS

A total of 2356 patients were included. Dyspeptic symptoms were highly frequent (close to 90% in both groups) and supraesophageal symptoms were also common (50-60%). Patients with persistent symptoms despite treatment were older, and had more supraesophageal symptoms; in addition, the typical supraesophageal and dyspeptic symptoms of GERD were more severe in these patients. Severity evaluations by patients and doctors were concordant but patients considered severity to be greater. Older age was a risk factor for supraesophageal symptoms, female gender for dyspeptic symptoms and body mass index for greater severity of GERD symptoms. Endoscopy was requested in about 60% of the patients. Diet counseling was advised in most patients and postural recommendations were made in more than half. Proton pump inhibitors were prescribed in almost all patients, and were associated with prokinetics and/or antacids in many patients.

CONCLUSIONS

Dyspeptic symptoms should not be considered as independent of GERD, and typical and atypical symptoms are associated in 50% of patients. Gastroenterologists follow clinical practice guidelines fairly closely but diagnostic procedures seem to be overindicated.

Gastroesophageal reflux disease and sleep disorders: evidence for a causal link and therapeutic implications

Gastroesophageal reflux disease (GERD) and sleep disturbances are both common health problems. There is a significant association between disturbed sleep and GERD, and this may be bidirectional. Sleep disorders may induce gastrointestinal (GI) disturbances, while GI symptoms also may provoke or worsen sleep derangements. Reflux of gastric acid is a less frequent event during sleep, however, acid clearance mechanisms (including swallowing, salivation and primary esophageal motility) are impaired during sleep resulting in prolongation of acid contact time. Nighttime reflux can lead to sleep disturbance and sleep disturbance may further aggravate GERD by prolonged acid contact time and heightened sensory perception. This may facilitate the occurrence of complicated GERD and decreased quality of life. However, the interplay between sleep problems and GERD is complex, and there are still relatively limited data on this issue. Further investigation of sleep-related GERD may identify common pathophysiological themes and new therapeutic targets.