Heartburn in patients with achalasia

Modern Achalasia: Diagnosis, Classification, and Treatment

Achalasia is a major esophageal motor disorder featured by the altered relaxation of the esophagogastric junction in the absence of effective peristaltic activity. As a consequence of the esophageal outflow obstruction, achalasia patients present with clinical symptoms of dysphagia, chest pain, weight loss, and regurgitation of indigested food. Other less specific symptoms can also present including heartburn, chronic cough, and aspiration pneumonia. The delay in diagnosis, particularly when the presenting symptoms mimic those of gastroesophageal reflux disease, may be as long as several years. The widespread use of high-resolution manometry has permitted earlier detection and uncovered achalasia phenotypes which can have prognostic and therapeutic implications. Other tools have also emerged to help define achalasia severity and which can be used as objective measures of response to therapy including the timed barium esophagogram and the functional lumen imaging probe. Such diagnostic innovations, along with the increased awareness by clinicians and patients due to the availability of alternative therapeutic approaches (laparoscopic and robotic Heller myotomy, and peroral endoscopic myotomy) have radically changed the natural history of the disorder. Herein, we report the most recent advances in the diagnosis, classification, and management of esophageal achalasia and underline the still-grey areas that needs to be addressed by future research to reach the goal of personalizing treatment.

Multiple Sclerosis Is Associated With Achalasia and Diffuse Esophageal Spasm

Background/Aims

Multiple sclerosis (MS) is an inflammatory disease characterized by the demyelination of primarily the central nervous system. Diffuse esophageal spasm (DES) and achalasia are both disorders of esophageal peristalsis which cause clinical symptoms of dysphagia. Mechanisms involving dysfunction of the pre- and post-ganglionic nerve fibers of the myenteric plexus have been proposed. We sought to determine whether MS confers an increased risk of developing achalasia or DES.

Methods

Cohort analysis was done using the Explorys database. Univariate logistic regression was performed to determine the odds MS confers to each motility disorder studied. Comparison of proportions of dysautonomia comorbidities was performed among the cohorts. Patients with a prior diagnosis of diabetes mellitus, chronic Chagas' disease, opioid use, or CREST syndrome were excluded from the study.

Results

Odds of MS patients developing achalasia or DES were (OR, 2.09; 95% CI, 1.73-2.52; P < 0.001) and (OR, 3.15; 95% CI, 2.89-3.42; P < 0.001), respectively. In the MS/achalasia cohort, 27.27%, 18.18%, 9.09%, and 45.45% patients had urinary incontinence, gastroparesis, impotence, and insomnia, respectively. In the MS/DES cohort, 35.19%, 11.11%, 3.70%, and 55.56% had these symptoms. In MS patients without motility disorders, 12.64%, 0.79%, 2.21%, and 21.85% had these symptoms.

Conclusions

Patients with MS have higher odds of developing achalasia or DES compared to patients without MS. MS patients with achalasia or DES have higher rates of dysautonomia comorbidities. This suggests that these patients have a more severe disease phenotype in regards to the extent of neuronal degradation and demyelination causing the autonomic dysfunction.

Atypical presentations and pitfalls of achalasia

Achalasia is a rare disease with significant diagnostic delay and association with false diagnoses and unnecessary interventions. It remains unclear, whether atypical presentations, misinterpreted symptoms or inconclusive diagnostics are the cause. The aim of this study was the characterization of typical and atypical features of achalasia and their impact on delays, misinterpretations or false diagnoses. A retrospective analysis of prospective database over a period of 30 years was performed. Data about symptoms, delays and false diagnoses were obtained and correlated with manometric, endoscopic and radiologic findings. Totally, 300 patients with achalasia were included. Typical symptoms (dysphagia, regurgitation, weight loss and retrosternal pain) were present in 98.7%, 88%, 58.4% and 52.4%. The mean diagnostic delay was 4.7 years. Atypical symptoms were found in 61.7% and led to a delay of 6 months. Atypical gastrointestinal symptoms were common (43%), mostly 'heartburn' (16.3%), 'vomiting' (15.3%) or belching (7.7%). A single false diagnosis occurred in 26%, multiple in 16%. Major gastrointestinal misdiagnoses were GERD in 16.7% and eosinophilic esophagitis in 4%. Other false diagnosis affected ENT-, psychiatric, neurologic, cardiologic or thyroid diseases. Pitfalls were the description of 'heartburn' or 'nausea'. Tertiary contractions at barium swallows, hiatal hernias and 'reflux-like' changes at endoscopy or eosinophils in the biopsies were misleading. Atypical symptoms are common in achalasia, but they are not the sole source for diagnostic delays. Misleading descriptions of typical symptoms or misinterpretation of diagnostic studies contribute to false diagnoses and delays.

The broad impact of functional lumen imaging probe panometry in addition to high-resolution manometry in an esophageal clinical practice

High-resolution manometry (HRM) with the Chicago Classification (CC) is the standard paradigm to define esophageal motility disorders. Functional lumen imaging probe (FLIP) panometry utilizes impedance planimetry to characterize esophageal compliance and secondary peristalsis. The aim of this study was to explore the clinical impact of FLIP panometry in addition to HRM. A retrospective chart review was performed on FLIP panometry cases utilizing the 322N catheter. Cases with prior foregut surgeries or botulinum injection within 6 months of FLIP panometry were excluded. EGJ-diameter and distensibility index (DI) and secondary contraction patterns at increasing balloon volumes were recorded. An EGJ-DI of ≥2.8 mm2/mm Hg at 60 mL was considered as a normal EGJ distensibility. CC diagnosis, Eckhardt score, Brief Esophageal Dysphagia Questionnaire, and clinical outcomes were obtained for each FLIP case. A total of 186 cases were included. Absent contractility and achalasia types 1 and 2 showed predominantly absent secondary contraction patterns, while type 3 had a variety of secondary contractile patterns on FLIP panometry. Among 77 cases with EGJ outflow obstruction (EGJOO), 60% had a low EGJ-DI. Among those with no motility disorder or ineffective esophageal motility on HRM, 27% had a low DI and 47% had sustained contractions on FLIP, raising concern for an esophageal dysmotility process along the achalasia and/or spastic spectrum. FLIP panometry often confirmed findings on HRM in achalasia and absent contractility. FLIP panometry is useful in characterizing EGJOO cases. Spastic features on FLIP panometry may raise concern for a motility disorder on the spastic spectrum not captured by HRM. Further studies are needed on FLIP panometry to determine how to proceed with discrepancy with HRM and explore diagnoses beyond the CC.

Trends in gastroesophageal reflux disease research: A bibliometric and visualized study

Background

Gastroesophageal reflux disease (GERD), a disorder resulting from the retrograde flow of gastric contents into the esophagus, affects an estimated 10-30% of the Western population, which is characterized by multifactorial pathogenesis. Over the past few decades, there have been many aspects of uncertainty regarding GERD leading to an ongoing interest in the field as reflected by a large number of publications, whose heterogeneity and variable quality may present a challenge for researchers to measure their scientific impact, identify scientific collaborations, and to grasp actively researched themes in the GERD field. Accordingly, we aim to evaluate the knowledge structure, evolution of research themes, and emerging topics of GERD research between 2012 and 2022 with the help of bibliometric approaches.

Methods

The literature focusing on GERD from 2012 to 2022 was retrieved from the Science Citation Index Expanded of the Web of Science Core Collection. The overall publication performance, the most prolific countries or regions, authors, journals and resources-, knowledge- and intellectual-networking, as well as the co-citation analysis of references and keywords, were analyzed through Microsoft Office Excel 2019, CiteSpace, and VOSviewer.

Results

A total of 8,964 publications were included in the study. The USA published the most articles (3,204, 35.74%). Mayo Clin ranked first in the number of articles published (201, 2.24%). EDOARDO SAVARINO was the most productive author (86, 0.96%). The most productive journal in this field was SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES (304, 3.39%). AMERICAN JOURNAL OF GASTROENTEROLOGY had the most co-citations (4,953, 3.30%). Keywords with the ongoing strong citation bursts were transoral incision less fundoplication, eosinophilic esophagitis, baseline impedance, and functional heartburn.

Conclusion

For the first time, we obtained deep insights into GERD research through bibliometric analysis. Findings in this study will be helpful for scholars seeking to understand essential information in this field and identify research frontiers.

Esophageal Achalasia: Diagnostic Evaluation

A precise diagnosis is key to the successful treatment of achalasia. Barium swallow, upper endoscopy and high-resolution manometry provide the necessary information about a patient's anatomy, absence of other diseases, and type of achalasia (I, II, III). High-resolution manometry also has prognostic value, the best results of treatment being obtained in type II achalasia according to the Chicago classification. Abdominal CT scanning and endoscopic ultrasound might be warranted if an underlying malignancy is suspected.

Advances and horizons for artificial intelligence of endoscopic screening and surveillance of gastric and esophageal disease

The development of artificial intelligence in endoscopic assessment of the gastrointestinal tract has shown progressive enhancement in diagnostic acuity. This review discusses the expanding applications for gastric and esophageal diseases. The gastric section covers the utility of AI in detecting and characterizing gastric polyps and further explores prevention, detection, and classification of gastric cancer. The esophageal discussion highlights applications for use in screening and surveillance in Barrett's esophagus and in high-risk conditions for esophageal squamous cell carcinoma. Additionally, these discussions highlight applications for use in assessing eosinophilic esophagitis and future potential in assessing esophageal microbiome changes.

Evaluation and Treatment of Patients with Persistent Reflux Symptoms Despite Proton Pump Inhibitor Treatment

Despite the exceptional efficacy of proton pump inhibitors (PPIs) in healing reflux esophagitis complicating gastroesophageal reflux disease (GERD), up to 40% of patients who take PPIs for GERD complain of persistent GERD symptoms. There is no clear consensus on the type, dosing, and duration of PPI therapy required to establish a diagnosis of PPI-refractory GERD symptoms, but most authorities do not consider patients "PPI-refractory" unless they have been on double-dose PPIs. This article discusses the mechanisms that might underlie heartburn that does not respond PPIs and an approach to the management of patients with PPI-refractory GERD symptoms.

ACG Clinical Guidelines: Diagnosis and Management of Achalasia

Achalasia is an esophageal motility disorder characterized by aberrant peristalsis and insufficient relaxation of the lower esophageal sphincter. Patients most commonly present with dysphagia to solids and liquids, regurgitation, and occasional chest pain with or without weight loss. High-resolution manometry has identified 3 subtypes of achalasia distinguished by pressurization and contraction patterns. Endoscopic findings of retained saliva with puckering of the gastroesophageal junction or esophagram findings of a dilated esophagus with bird beaking are important diagnostic clues. In this American College of Gastroenterology guideline, we used the Grading of Recommendations Assessment, Development and Evaluation process to provide clinical guidance on how best to diagnose and treat patients with achalasia.

Refractory Gastroesophageal Reflux Disease and Functional Heartburn

This report discusses the potential mechanisms that might underlie refractory GERD and functional heartburn, and how to distinguish among those mechanisms using a systematic evaluation that includes careful medical history, endoscopy with esophageal biopsy, esophageal manometry, and esophageal multichannel intraluminal impedance-pH monitoring. The report provides an approach to patient management that depends on the underlying mechanism identified by this systematic evaluation.

Indian consensus on gastroesophageal reflux disease in adults: A position statement of the Indian Society of Gastroenterology

The Indian Society of Gastroenterology developed this evidence-based practice guideline for management of gastroesophageal reflux disease (GERD) in adults. A modified Delphi process was used to develop this consensus containing 58 statements, which were generated by electronic voting iteration as well as face-to-face meeting and review of the supporting literature primarily from India. These statements include 10 on epidemiology, 8 on clinical presentation, 10 on investigations, 23 on treatment (including medical, endoscopic, and surgical modalities), and 7 on complications of GERD. When the proportion of those who voted either to accept completely or with minor reservation was 80% or higher, the statement was regarded as accepted. The prevalence of GERD in India ranges from 7.6% to 30%, being  < 10% in most population studies, and higher in cohort studies. The dietary factors associated with GERD include use of spices and non-vegetarian food. Helicobacter pylori is thought to have a negative relation with GERD; H. pylori negative patients have higher grade of symptoms of GERD and esophagitis. Less than 10% of GERD patients in India have erosive esophagitis. In patients with occasional or mild symptoms, antacids and histamine H₂ receptor blockers (H2RAs) may be used, and proton pump inhibitors (PPI) should be used in patients with frequent or severe symptoms. Prokinetics have limited proven role in management of GERD.

Surgical Management of Gastroesophageal Reflux Disease in Patients with Severe Esophageal Dysmotility

BACKGROUND

Gastroesophageal reflux disease (GERD) and esophageal dysmotility are often disqualifying criteria for fundoplication due to dysphagia complications. A tailored partial fundoplication may improve GERD in patients with severe esophageal motility disorders. We evaluate this approach on GERD improvement in non-achalasia esophageal dysmotility patients.

METHODS

A single-institution prospective database was reviewed (2007-2016), with inclusion criteria of GERD, previous diagnosis of non-achalasia esophageal motility disorder, and laparoscopic partial fundoplication. Diagnosis of previous achalasia diagnosis or diffused esophageal spasm was excluded. Motility studies, pre- and post-upper gastrointestinal imaging (UGI), esophageal symptom scores, antacid, and PPI use were collected pre-op, 6 months, 12 months, and long-term (LT). Statistical analysis was made using SPSS v.23.0.0, α = 0.05.

RESULTS

Fifty-two patients met the inclusion criteria. A total of 17.3% had esophageal body amotility, 79.6% had severe esophageal dysmotility. A total of 65.9% women (mean age 64 ± 15.7), mean peristalsis 45.3 ± 32.6%, and failed peristalsis 36.0 ± 32.2%. Mean LES residual pressure was 15.0 ± 18.0 mmHg, and 40.7% had hypotensive LES. Mean follow-up time was 25 months [1-7 years], with significant improvement in symptoms and reduction in PPI and antacid use at all time-points compared to pre-op. A total of 74% had UGI studies at 12 months; all showed persistent dysmotility. Six patients had radiographic hiatal hernia recurrence, with only one being clinically symptomatic postoperatively. Three required dilation for persistent dysphagia.

CONCLUSIONS

A tailored partial fundoplication may be effective in symptom relief for non-achalasia patients with esophageal motility disorders and GERD. Significant symptom improvement, low HHR, and PPI use clearly indicate this approach to be effective for this population.

A gastroenterologist's perspective on the role of barium esophagography in gastroesophageal reflux disease

Although endoscopy is a sophisticated technique for evaluating patients with gastroesophageal reflux disease (GERD), the single diagnostic test that enables the most comprehensive assessment for GERD is a well-performed video esophagram. Not only does the barium study permit assessment of morphologic abnormalities in the pharynx and esophagus, but also oropharyngeal swallowing function, esophageal motility, and gastroesophageal reflux. These factors are especially important for detection of anatomic findings such as strictures and hernias, for assessment of esophageal motility before and after fundoplication, and for excluding conditions that mimic GERD. Thus, esophagography and esophagoscopy are complementary procedures that provide a more comprehensive and therapeutically actionable plan for patients with GERD than either diagnostic test alone.

Achalasia following reflux disease: coincidence, consequence, or accommodation? An experience-based literature review

Achalasia is a motility disorder of the esophagus characterized by the defective peristaltic activity of the esophageal body and impaired relaxation of the lower esophageal sphincter due to the degeneration of the inhibitory neurons in the myenteric plexus of the esophageal wall. The histopathological and pathophysiological changes in achalasia have been well described. However, the exact etiological factors leading to the disease still remain unclear. Currently, achalasia is believed to be a multifactorial disease, involving both extrinsic and intrinsic factors. Based on our experience and the review of literature, we believe that gastroesophageal reflux disease (GERD) might be one of the triggering factors leading to the development of achalasia. However, it is also stated that the two diseases can simultaneously appear independently from each other. Considering the large number and routine treatment of patients with GERD and achalasia, the rare combination of the two may even remain unnoticed; thus, the analysis of larger patient groups with this entity is not feasible. In this context, we report four cases where long-standing reflux symptoms preceded the development of achalasia. A literature review of the available data is also given. We hypothesize that achalasia following the chronic acid exposure of the esophagus is not accidental but either a consequence of a chronic inflammation or a protective reaction of the organism in order to prevent aspiration and lessen reflux-related symptoms. This hypothesis awaits further clinical confirmation.

An Overview of Achalasia and Its Subtypes

Achalasia is one of the most studied esophageal motility disorders. However, the pathophysiology and reasons that patients develop achalasia are still unclear. Patients often present with dysphagia to solids and liquids, regurgitation, and varying degrees of weight loss. There is significant latency prior to diagnosis, which can have nutritional implications. The diagnosis is suspected based on clinical history and confirmed by esophageal high-resolution manometry testing. Esophagogastroduodenoscopy is necessary to rule out potential malignancy that can mimic achalasia. Recent data presented in abstract form suggest that patients with type II achalasia may be most likely, and patients with type III achalasia may be least likely, to report weight loss compared to patients with type I achalasia. Although achalasia cannot be permanently cured, palliation of symptoms is possible in over 90% of patients with the treatment modalities currently available (pneumatic dilation, Heller myotomy, or peroral endoscopic myotomy). This article reviews the clinical presentation, diagnosis, and management options in patients with achalasia, as well as potential insights into histopathologic differences and nutritional implications of the subtypes of achalasia.

Is Gastroesophageal Reflux Disease and Achalasia Coincident or Not?

Achalasia and gastroesophageal reflux disease (GERD) are on opposite ends of the spectrum of lower esophageal sphincter dysfunction. Heartburn is the main symptom of GERD. However, heartburn and regurgitation are frequently observed in patients who have achalasia. The diagnosis of achalasia might be delayed because these symptoms are misinterpreted as gastroesophageal reflux. Here, we reviewed the clinical characteristics of patients with the erroneous diagnosis of GERD who actually had untreated achalasia.

Idiopathic (primary) achalasia: a review

Idiopathic achalasia is a primary esophageal motor disorder characterized by loss of esophageal peristalsis and insufficient lower esophageal sphincter relaxation in response to deglutition. Patients with achalasia commonly complain of dysphagia to solids and liquids, bland regurgitation often unresponsive to an adequate trial of proton pump inhibitor, and chest pain. Weight loss is present in many, but not all patients. Although the precise etiology is unknown, it is often thought to be either autoimmune, viral immune, or neurodegenerative. The diagnosis is based on history of the disease, barium esophagogram, and esophageal motility testing. Endoscopic assessment of the gastroesophageal junction and gastric cardia is necessary to rule out malignancy. Newer diagnostic modalities such as high resolution manometry help in predicting treatment response in achalasia based on esophageal pressure topography patterns identifying three phenotypes of achalasia (I-III) and outcome studies suggest better treatment response with types I and II compared to type III. Although achalasia cannot be permanently cured, excellent outcomes are achieved in over 90 % of patients. Current medical and surgical therapeutic options (pneumatic dilation, endoscopic and surgical myotomy, and pharmacologic agents) aim at reducing the LES pressure and facilitating esophageal emptying by gravity and hydrostatic pressure of retained food and liquids. Either graded pneumatic dilatation or laparoscopic surgical myotomy with a partial fundoplication are recommended as initial therapy guided by patient age, gender, preference, and local institutional expertise. The prognosis in achalasia patients is excellent. Most patients who are appropriately treated have a normal life expectancy but the disease does recur and the patient may need intermittent treatment.

Dysphagia in the elderly

Elderly patients are inherently predisposed to dysphagia predominately because of comorbid health conditions. With the aging of the population in the United States, along with the increased prevalence of obesity and gastroesophageal reflux disease, healthcare providers will increasingly encounter older patients with either oropharyngeal or esophageal disease and complaints of dysphagia. Useful tests to evaluate dysphagia include the videofluoroscopic swallowing study and the fiberoptic endoscopic evaluation of swallowing. Swallow rehabilitation is useful to help patients compensate for swallowing difficulty and ultimately help strengthen the neuromusculature involved in swallowing.

The management of esophageal achalasia: from diagnosis to surgical treatment

The goal of this review is to illustrate our approach to patients with achalasia in terms of preoperative evaluation and surgical technique. Indications, patient selection and management are herein discussed. Specifically, we illustrate the pathogenetic theories and diagnostic algorithm with current up-to-date techniques to diagnose achalasia and its manometric variants. Finally, we focus on the therapeutic approaches available today: medical and surgical. A special emphasis is given on the surgical treatment of achalasia and we provide the reader with a detailed description of our pre and postoperative management.

Longitudinal muscle dysfunction in achalasia esophagus and its relevance

Muscularis propria of the esophagus is organized into circular and longitudinal muscle layers. Goal of this review is to summarize the role of longitudinal muscle in physiology and pathophysiology of esophageal sensory and motor function. Simultaneous manometry and ultrasound imaging that measure circular and longitudinal muscle contraction respectively reveal that during peristalsis 2 layers of the esophagus contract in perfect synchrony. On the other hand, during transient relaxation of the lower esophageal sphincter (LES), longitudinal muscle contracts independently of circular muscle. Recent studies provide novel insights, i.e., longitudinal muscle contraction of the esophagus induces LES relaxation and possibly descending relaxation of the esophagus. In achalasia esophagus and other motility disorders there is discoordination between the 2 muscle layers. Longitudinal muscle contraction patterns are different in the recently described three types of achalasia identified by high-resolution manometry. Robust contraction of the longitudinal muscle in type II achalasia causes pan-esophageal pressurization and is the mechanism of whatever little esophageal emptying that take place in the absence of peristalsis and impaired LES relaxation. It may be that preserved longitudinal muscle contraction is also the reason for superior outcome to medical/surgical therapy in type II achalasia esophagus. Prolonged contractions of longitudinal muscles of the esophagus is a possible mechanism of heartburn and "angina like" pain seen in esophageal motility disorders and possibly achalasia esophagus. Novel techniques to record longitudinal muscle contraction are on the horizon. Neuro-pharmacologic control of circular and longitudinal muscles is different, which provides an important opportunity for the development of novel pharmacological therapies to treat sensory and motor disorders of the esophagus.

Achalasia

Endoscopic therapy for achalasia is centered on disrupting or weakening the lower esophageal sphincter. The three traditional treatment options for achalasia are surgical myotomy, pneumatic dilation, and botulinum toxin injection. Pneumatic dilation yields results that are generally better than botulinum toxin injection and may approach a clinical response comparable with surgery. Per oral endoscopic myotomy is a newer endoscopic modality that will likely change the treatment paradigm for achalasia.

Symptoms and esophageal motility based on phenotypic findings of scleroderma

Scleroderma esophagus is characterized by ineffective peristalsis and reduced esophageal sphincter pressure. Esophageal disease in scleroderma can precede cutaneous manifestations and has been associated with Raynaud's phenomenon (RP) and pulmonary fibrosis (PF). The objective of the study is to evaluate the impact of cutaneous findings, RP, and PF on demographics, symptoms, and esophageal motility in patients with scleroderma. Scleroderma patients with esophageal involvement were included after review of esophageal manometries and charts over a 6-year period. High-resolution esophageal manometry was performed. Patients completed a symptom questionnaire. The study enrolled 28 patients (22 females; mean age 50.3 ± 12.8 years) with scleroderma esophagus. Patients without skin involvement (n= 12) reported more severe heartburn (P= 0.02), while those with cutaneous findings (n= 16) had more frequent dysphagia with solids (P= 0.02). Patients with RP (n= 22) had lower amplitude of distal esophageal contractions (P= 0.01) than those without RP (n= 6). Patients with PF (n= 11) reported more severe coughing and wheezing (both P= 0.03) than those without lung disease (n= 17). This study highlights subgroups of patients with scleroderma esophagus according to phenotypic findings of dermatologic changes, RP, and PF. Heartburn and dysphagia are important symptoms that may be associated with different stages of disease progression based on skin changes in scleroderma. RP was associated with greater esophageal dysmotility. Coughing and wheezing were more severe in patients with PF.

Erroneous diagnosis of gastroesophageal reflux disease in achalasia

BACKGROUND & AIMS

Most experienced gastroenterologists have seen one or several cases of achalasia patients who have been erroneously diagnosed with gastroesophageal reflux disease (GERD) or even underwent antireflux surgery. We aim to describe the current knowledge about the diagnostic features of achalasia and their overlap with GERD. Furthermore, we present 3 cases in which achalasia was mistaken for GERD.

METHODS

Search of the literature published in English using the PubMed database and relevant abstracts presented at international conventions.

RESULTS

Typical features of GERD such as heartburn, retrosternal pain, esophagitis, and pathologic acid exposure can be observed in achalasia patients. Diagnostic tests such as endoscopy and radiography lack sensitivity and specificity for achalasia. Current diagnostic guidelines for antireflux surgery do not stipulate that achalasia should be ruled out preoperatively.

CONCLUSIONS

Clinical presentation as well as the diagnostic work-up of achalasia patients can show overlap with GERD. Mistaking achalasia for GERD can be avoided by esophageal manometry and this should therefore be performed in all patients undergoing surgical fundoplication.

Achalasia

This article reviews the diagnosis and treatment of achalasia, a rare esophageal motility disorder characterized by absent peristalsis and failure of the lower esophageal sphincter (LES) to relax. Various treatment options including management with sublingual nitrates or calcium channel blockers, injection of the LES with botulism toxin, pneumatic dilation of the LES, and pneumatic dilation are discussed. Laparoscopic Heller myotomy is minimally invasive with incumbent low morbidity and mortality rates, and combined with a partial fundoplication is a durable, safe, and effective treatment option for patients with achalasia.

High prevalence of heartburn and low acid sensitivity in patients with idiopathic achalasia

BACKGROUND

Heartburn is frequently reported by patients with achalasia before treatment. However, the esophageal sensitivity to acid as a possible mediator of this symptom has not been previously evaluated.

AIM

To evaluate the prevalence of gastroesophageal reflux symptoms and the esophageal sensitivity to acid perfusion in patients with untreated achalasia.

METHODS

Forty patients with achalasia were prospectively evaluated. Forty-three patients with gastroesophageal reflux disease comprised the control group (ten of them with Barrett's esophagus). Symptoms were evaluated by a structured clinical questionnaire. Objective assessment was performed by ambulatory 24-h esophageal pH monitoring and endoscopy. Esophageal sensitivity to acid was evaluated by esophageal perfusion of ClH 0.1 N.

RESULTS

Fifteen (37%) of the 40 patients with achalasia presented heartburn, but only four of them had esophagitis and/or abnormal esophageal pH recording. Eight patients had abnormal pH recording. Three patients had esophagitis. The esophagus was sensitive to acid in seven (17%) patients with achalasia, three of them with heartburn and one with abnormal pH recording. In the control group, 40 of 43 (93%) presented heartburn. Acid perfusion was positive in 32 (74%). Sensitivity to acid was lower in patients with achalasia than in those with gastroesophageal reflux disease with or without Barrett's esophagus.

CONCLUSIONS

The prevalence of heartburn in patients with achalasia is high, although its association with objective indicators of gastroesophageal reflux disease is weak. Patients with achalasia have lower esophageal sensitivity to acid than patients with GERD, suggesting that heartburn is does not arise from this condition.

24-h pH monitoring patterns and clinical response after achalasia treatment with pneumatic dilation or laparoscopic Heller myotomy

BACKGROUND

The most effective treatment for achalasia is pneumatic dilation or myotomy. The best option is still controversial and incidence of complications could help choosing. Gastro-oesophageal reflux (GER) is the most frequent complication after treatment for achalasia. The 24-h pH monitoring (24-h pH) is the best method to evaluate true GER.

AIM

To analyse the 24-h pH patterns after treatment, correlating with therapeutic success.

METHODS

Untreated patients with achalasia were randomized to pneumatic dilation or laparoscopic Heller myotomy with fundoplication (LHM+Fp) and evaluated with clinical/manometric results and 24-h pH.

RESULTS

Ninety-four patients were analysed pre-treatment and 85 post-treatment. Clinical success was 73.8% in pneumatic dilation group and 88.3% in LHM+Fp group (P = 0.08). The incidence of GER was 31% in pneumatic dilation, and 4.7% in LHM+Fp (P = 0.001). The occurrence of hypotensive lower oesophageal sphincter (LES) was 53.3% in patients who developed GER and 28.6% in patients with 24-h pH suggesting fermentation (P = 0.019). The rates of dysphagia resolution in patients with 24-h pH of GER and fermentation were respectively 86.7% and 85.7% (P = 0.89).

CONCLUSIONS

True GER 24-h pH is more frequent after pneumatic dilation for achalasia, and it is associated with a hypotensive LES. A 24-h pH suggestive of fermentation or true GER is not associated with worse clinical/manometric results.

Demographic, clinical features and treatment outcomes in 700 achalasia patients in iran

BACKGROUND Achalasia is the most recognized motor disorder of the esophagus. Because it is an uncommon disease, most studies have reviewed small numbers of patients. Here, we report demographic, clinical features and treatment outcomes in 700 achalasia patients. METHODS In all patients, diagnosis was established based on clinical, radiological, endoscopic and manometric criteria. A questionnaire was completed for each patient and included the patient's age, gender, initial symptoms, frequency of different symptoms, presence of positive family history for achalasia, other accompanying diseases and treatment outcomes. RESULTS In our study men were affected more than women (54.3% vs. 45.7%). Patients' mean age was about 38 years. The most frequent symptoms noted were: dysphagia to solids and liquids, active regurgitation, passive regurgitation and weight loss, respectively. Women complained of chest pain more than men (59% vs. 47.1%, p=0.04). The vast majority of our patients were treated by pneumatic dilation (PD) of the LES and in long-term follow-up, 67% were in the responder group. Females responded better than males to PD. CONCLUSION Dysphagia to solids is the most common symptom in patients with achalasia. Chest pain was significantly higher among women. PD is an effective treatment for achalasia with long-term efficacy in the majority of patients.

A unique esophageal motor pattern that involves longitudinal muscles is responsible for emptying in achalasia esophagus

BACKGROUND & AIMS

Achalasia esophagus is characterized by loss of peristalsis and incomplete esophagogastric junction (EGJ) relaxation. We studied mechanisms of esophageal emptying in patients with achalasia using simultaneous high-resolution manometry, multiple intraluminal impedance, and high-frequency intraluminal ultrasonography image recordings.

METHODS

Achalasia was categorized into 3 subtypes, based on the esophageal response to swallows: types 1 and 2 were defined by simultaneous pressure waves of <30 mm Hg and >30 mm Hg, respectively, and type 3 was defined by spastic simultaneous esophageal contractions.

RESULTS

Based on high-resolution manometry, the predominant achalasia pattern of type 2 was characterized by a unique motor pattern that consisted of upper esophageal sphincter contraction, simultaneous esophageal pressure (pan-esophageal pressurization), and EGJ contraction following swallows. High-frequency intraluminal ultrasonography identified longitudinal muscle contraction of the distal esophagus as the cause of pan-esophageal pressurization in type 2 achalasia. Multiple intraluminal impedance revealed that esophageal emptying occurred intermittently (36% swallows) during periods of pan-esophageal pressurization. Patients with achalasia of types 1 and 3 had no emptying or relatively normal emptying during most swallows, respectively.

CONCLUSIONS

In achalasia, esophageal emptying results from swallow-induced longitudinal muscle contraction of the distal esophagus, which increases esophageal pressure and allows flow across the nonrelaxed EGJ.

Manometric and symptomatic spectrum of motor dysphagia in a tertiary referral center in northern India

BACKGROUND

We studied the spectrum of motor dysphagia in a northern Indian tertiary referral center.

METHODS

In this retrospective study, consecutive patients with motor dysphagia referred to the Gastrointestinal Pathophysiology and Motility Laboratory from 2002 to 2007 were evaluated clinically and with eight-channel water-perfusion manometry. Causes of dysphagia were diagnosed using standard criteria.

RESULTS

Of 250 patients (age 41.3 [15.0] years, 146 men), 193 (77%) had achalasia cardia (AC) and 57 (23%) had other causes (11, 4.4%: diffuse esophageal spasm [DES]; 9, 3.6%: hypertensive lower esophageal sphincter [Hy LES]); manometry was normal in 37 patients. Twenty-seven patients (14%) had vigorous AC. Duration of dysphagia at presentation was longer in those with AC and Hy LES than in normal manometry (NM) (21 months [1-180] vs. 6 [1-360], p = 0.000; 24 months [7-48] vs. 6 [1-360], p = 0.015). Regurgitation and bolus obstruction were more frequent in those with AC than in NM (89/154, 57.79% vs. 3/27, 11.11%, p = 0.000001). Heartburn was less frequent in patients with AC than in others (AC: 4/146, 2.73% vs. normal: 4/27, 14.8% [p = 0.02] and others: 3/15, 20% [p = 0.018]). Chest pain was reported by 74/135 (54.8%) classic and 12/19 (63.2%) vigorous AC (p = NS). Patients with NM had lower LES pressure than those with classic AC, Hy LES and vigorous AC (p < 0.0001 in each case). Patients with DES had lower LES pressure than in classic AC, Hy LES and vigorous AC (p = 0.043, p < 0.0001, and p = 0.002, respectively). Patients with classic AC had lower LES pressure than in Hy LES and vigorous AC (p = 0.024, p = 0.001, respectively).

CONCLUSION

Classic AC was the commonest cause of motor dysphagia in our center. AC was associated with higher LES pressure, longer duration of dysphagia, frequent regurgitation and bolus obstruction.

Achalasia: A review of Western and Iranian experiences

Achalasia is a primary motor disorder of the esophagus, in which esophageal emptying is impaired. Diagnosis of achalasia is based on clinical findings. The diagnosis is confirmed by radiographic, endoscopic, and manometric evaluations. Several treatments for achalasia have been introduced. We searched the PubMed Database for original articles and meta-analyses about achalasia to summarize the current knowledge regarding this disease, with particular focus on different procedures that are used for treatment of achalasia. We also report the Iranian experience of treatment of this disease, since it could be considered as a model for medium-resource countries. Myotomy, particularly laparoscopic myotomy with fundoplication, is the most effective treatment for achalasia. Compared to other treatments, however, the initial cost of myotomy is usually higher and the recovery period is longer. When performing myotomy is not indicated or not possible, graded pneumatic dilation with slow rate of balloon inflation seems to be an effective and safe initial alternative. Injection of botulinum toxin into the lower esophageal sphincter before pneumatic dilation may increase remission rates. However, this needs to be confirmed in further studies. Due to lack of adequate information regarding the role of expandable stents in the treatment of achalasia, insertion of stents does not currently seem to be a recommended treatment. In summary, laparoscopic myotomy can be considered as the procedure of choice for treatment of achalasia. Graded pneumatic dilation is an effective alternative when the performance of myotomy is not possible for any reason.

Current clinical approach to achalasia

Idiopathic achalasia is a rare primary motility disorder of the esophagus. The classical features are incomplete relaxation of a frequently hypertensive lower esophageal sphincter (LES) and a lack of peristalsis in the tubular esophagus. These motor abnormalities lead to dysphagia, stasis, regurgitation, weight loss, or secondary respiratory complications. Although major strides have been made in understanding the pathogenesis of this rare disorder, including a probable autoimmune mediated destruction of inhibitory neurons in response to an unknown insult in genetically susceptible individuals, a definite trigger has not been identified. The diagnosis of achalasia is suggested by clinical features and confirmed by further diagnostic tests, such as esophagogastroduodenoscopy (EGD), manometry or barium swallow. These studies are not only used to exclude pseudoachalasia, but also might help to categorize the disease by severity or clinical subtype. Recent advances in diagnostic methods, including high resolution manometry (HRM), might allow prediction of treatment responses. The primary treatments for achieving long-term symptom relief are surgery and endoscopic methods. Although limited high-quality data exist, it appears that laparoscopic Heller myotomy with partial fundoplication is superior to endoscopic methods in achieving long-term relief of symptoms in the majority of patients. However, the current clinical approach to achalasia will depend not only on patients’ characteristics and clinical subtypes of the disease, but also on local expertise and patient preferences.

Achalasia

Achalasia is the best understood and most readily treatable esophageal motility disorder. It serves as a prototype for disorders of the enteric nervous system with degeneration of the myenteric neurons that innervate the lower esophageal sphincter (LES) and esophageal body. Investigations into the pathogenesis have highlighted the importance of nitric oxide and the possible role of an autoimmune response to a viral insult in genetically susceptible individuals. Advances in diagnostic testing have delineated manometric variants of achalasia that have implications for management. Treatment studies have demonstrated the limited efficacy of botulinum toxin as well as less than ideal, long-term effectiveness of both pneumatic dilation and Heller myotomy. This article incorporates these recent developments into the current understanding of achalasia.

Effect of laparoscopic fundoplication on hypertensive lower esophageal sphincter associated with gastroesophageal reflux

For hypertensive lower esophageal sphincter with dysphagia and chest pain, a laparoscopic cardiomyotomy is recommended. Recently, the role of gastroesophageal reflux in this abnormality has been recognized. A prospective study on six patients with manometrically proven hypertensive lower esophageal sphincter was performed. Laparoscopic floppy Nissen fundoplication was performed in all cases. The first follow up was performed 6 weeks after the operation. The mean follow up time was 56 months (range 50-61). Before the operation, all patients had abnormal esophageal acid exposure. Mean DeMeester score was 41.7 (range 16.7-86). Average LES pressure before the operation was 50.5 mmHg (range 35.6-81.3). Six weeks after operation, all patients were symptom free. DeMeester score returned to a normal level of 2.9. Furthermore, a marked decrease in the lower esophageal sphincter pressure (24.7 mmHg) was detected. At late follow up, all patients were symptom-free, and only two patients agreed to undergo functional testing. The mean DeMeester score of this two patients was 1.2. The pressure remained at normal value (15.7 mmHg). In our study, an antireflux operation normalized lower esophageal sphincter pressure suggesting that abnormal esophageal acid exposure may be an etiologic factor in the development of hypertensive lower esophageal sphincter.

Patterns of esophageal acid exposure after laparoscopic Heller's myotomy and Dor's fundoplication for esophageal achalasia

BACKGROUND

Heller's myotomy for esophageal achalasia is associated with less esophageal acid gastroesophageal reflux when combined a Dor's fundoplication. The Aim of the study was to assess the incidence of postoperative esophageal acid exposure after laparoscopic Heller's myotomy and Dor's fundoplication (HM-DF).

METHODS

Seventy six patients (37 males) with esophageal achalasia were prospectively followed-up by clinical interview and laboratory tests before and after laparoscopic HM-DF. A symptom score was used for clinical assessment. Laboratory assessment included esophageal standard manometry, esophagogram and esophageal pH 24-hour monitoring before and 1- and 5-years after surgery.

RESULTS

Symptom score improved at 1-year after surgery (P < 0.001). Heartburn was only reported by 5 patients, dysphagia or/and regurgitation by 28 and substernal pain by 12. 91% of patients had satisfactory functional results. Pathological esophageal exposure to acid was seen in 21% of the cases. Pathological acid events showed the features of pseudoreflux in 66%t and those of true GER in 34%. Pathologically increased esophageal exposure to acid was more commonly detected in patients with a pseudodiverticulum (P = 0.001) and was related to the diameter of distal esophagus and symptom score (P < 0.001). There was no reduction in esophageal acid exposure after treatment with proton pump inhibitors in 16 patients. Neither the symptom score nor esophageal acid exposure at esophageal pH monitoring changed significantly at the 5-year follow-up in 35 patients. Esophageal configuration remained unchanged.

CONCLUSIONS

Increased esophageal exposure to acid after laparoscopic HM-DF for esophageal achalasia i) is detected in 21% of patients, and is rather the result of food stagnation than of true GER, ii) is more commonly seen in cases with pseudodiverticulum, iii) is related to the diameter of distal esophagus, iv) does not respond to antisecretory treatment and v) does not deteriorate by time.

Idiopathic (primary) achalasia

Idiopathic achalasia is a primary esophageal motor disorder characterized by esophageal aperistalsis and abnormal lower esophageal sphincter (LES) relaxation in response to deglutition. It is a rare disease with an annual incidence of approximately 1/100,000 and a prevalence rate of 1/10,000. The disease can occur at any age, with a similar rate in men and women, but is usually diagnosed between 25 and 60 years. It is characterized predominantly by dysphagia to solids and liquids, bland regurgitation, and chest pain. Weight loss (usually between 5 to 10 kg) is present in most but not in all patients. Heartburn occurs in 27%-42% of achalasia patients. Etiology is unknown. Some familial cases have been reported, but the rarity of familial occurrence does not support the hypothesis that genetic inheritance is a significant etiologic factor. Association of achalasia with viral infections and auto-antibodies against myenteric plexus has been reported, but the causal relationship remains unclear. The diagnosis is based on history of the disease, radiography (barium esophagogram), and esophageal motility testing (esophageal manometry). Endoscopic examination is important to rule out malignancy as the cause of achalasia. Treatment is strictly palliative. Current medical and surgical therapeutic options (pneumatic dilation, surgical myotomy, and pharmacologic agents) aimed at reducing the LES pressure and facilitating esophageal emptying by gravity and hydrostatic pressure of retained food and liquids. Although it cannot be permanently cured, excellent palliation is available in over 90% of patients.

Esophageal motor and sensory disorders: presentation, evaluation, and treatment

Esophageal motor and sensory disorders are relatively rare conditions in the general population and afflicted patients are often initially misdiagnosed as having gastroesophageal reflux disease. Tests for these disorders have imperfect gold standards and are adjuncts to sound diagnostic reasoning. Treatments are palliative and have not been rigorously evaluated for some disorders. Symptoms and complications from disease progression and relapse are common, so that patients need continued follow-up.

Pseudoachalasia in a patient after truncal vagotomy surgery successfully treated by subsequent pneumatic dilations

Pseudoachalasia is a difficult condition for the clinician to differentiate from idiopathic achalasia even by manometry, radiological studies or endoscopy. Its etiology is usually associated with tumors. In most cases, the diagnosis is made after surgical explorations. The proposed pathogenesis of the disease is considered as mechanical obstruction of the distal esophagus or infiltration of the malignancy that affects the inhibitory neurons of the meyenteric plexus in the majority of cases. Surgery has been reported as a cause of pseudoachalasia. We report a 70-year-old man who suffered from deglutination disorder caused by pseudo-achalasia after truncal vagotomy. The patient was symptom-free after a nine-year follow-up and complete recovery of esophageal motility status from pseudoachalasia after pneumatic dilations. We also reviewed the literature of pseudoachalasia.

Oesophagitis is common in patients with achalasia after pneumatic dilatation

BACKGROUND

Achalasia, an oesophageal motor disease, is associated with functional oesophageal obstruction. Food stasis can predispose for oesophagitis. Treatment aims at lowering of the lower oesophageal sphincter pressure, enhancing the risk of gastro-oesophageal reflux. Nevertheless, the incidence of oesophagitis after achalasia treatment is unknown.

AIM

To investigate the incidence and severity of oesophagitis in achalasia patients treated with pneumatic dilatation.

METHODS

A cohort of 331 patients with achalasia were treated with pneumatic dilatation and followed. Oesophagitis and stasis were assessed by endoscopy and inflammation was graded by histology.

RESULTS

251 patients were followed for a mean values of 8.4 years (range: 1-26). The average number of endoscopies with biopsy sample sets per patient was 4 (range: 1-17). Three patients had no histological signs of oesophagitis throughout follow-up, 139 had oesophagitis grade 1, 49 oesophagitis grade 2 and 60 grade 3. Specialized intestinal metaplasia was found in 37 patients. The association between endoscopic food stasis and histological inflammation was significant. The association between endoscopic signs of oesophagitis and histological inflammation was poor.

CONCLUSIONS

Forty percent of the achalasia patients develop chronic active or ulcerating oesophagitis after treatment. Inflammation was associated with food stasis. Because the sensitivity of endoscopy to detect inflammation is low, surveillance endoscopy with biopsy sampling and assessment of stasis is warranted to detect early neoplastic changes.

The relationship between gastro-oesophageal reflux symptoms and achalasia

BACKGROUND AND AIMS

Patients with achalasia can experience heartburn, which may be misinterpreted as gastro-oesophageal reflux disease (GORD), leading to a delay in diagnosis and subsequent treatment. We investigated the relationship between gastro-oesophageal reflux (GOR) and reflux symptoms in a large cohort of patients with achalasia.

METHODS

The symptoms of all patients with a manometric diagnosis of achalasia made over the past 15 years were studied. The types of treatment, onset and pattern of heartburn, lower oesophageal sphincter pressure (LOSP) and 24-h oesophageal pH studies were compared.

RESULTS

A total of 110 out of 225 untreated (48.9%) and 57 out of 99 treated (57.6%) patients experienced heartburn. An oesophageal pH study was performed on 80 patients and GOR was found in only six out of 57 untreated (10.5%) and 10 out of 23 treated (43.5%) patients. A low LOSP (<10 mmHg) was associated with an increased risk of GOR [odds ratio (OR) 14.2; 95% confidence interval (CI) 1.6-128.7; P<0.02). Treated patients were also more likely to develop GOR (OR 7.9; 95% CI 2.0-32.1; P<0.005). Neither the LOSP nor previous treatment was, however, a predictor of heartburn. The timing of the onset of dysphagia and heartburn was categorized in 111 patients. There was no significant difference in mean (or median) LOSP between these three groups, indicating that the LOSP is unlikely to predict the occurrence of symptoms.

CONCLUSIONS

Heartburn is common in patients with untreated and treated achalasia, but is a poor predictor of GORD. Such patients should always be investigated with a 24-h oesophageal pH study to clarify the presence of GORD.

Long-term risk of oesophagitis, Barrett's oesophagus and oesophageal cancer in achalasia patients

Achalasia is a motility disorder of the oesophagus of unknown origin in which loss of relaxation of the lower oesophageal sphincter (LOS) and aperistalsis in the distal oesophagus leads to functional oesophageal obstruction. The treatment is symptomatic, aimed at lowering of the LOS pressure, and may be accompanied by various side effects, including gastro-oesophageal reflux, a risk factor for oesophagitis and its complications. Stasis and fermentation can also lead to inflammation of the oesophageal mucosa, giving rise to hyperplasia of the epithelium, multifocal dysplasia and in some patients eventually squamous cell carcinoma. Unfortunately, the sensitivity and specificity of endoscopical inspection to assess inflammation or dysplasia of the oesophageal lining is low, such that biopsy sampling is necessary for accurate assessment. Although it is generally accepted that achalasia is a pre-malignant disorder, the reported increased risk of patients with achalasia developing a squamous cell carcinoma varies from 0 to 140 times that of the normal population. In addition, achalasia may predispose to Barrett's metaplasia and oesophageal adenocarcinoma, which have been described in case reports after myotomy. Surveillance endoscopy with tissue sampling to detect pre-neoplastic lesions has been recommended, even though this can be very difficult due to mucosal adherence of food as well as hyperplastic changes of the mucosa. In the event of moderate to severe inflammation and/or persisting stasis of food despite adequate LOS pressure-lowering therapy, the surveillance interval should be shortened and performed after a 3-day liquid diet. The exact technique and time intervals still need to be established, however.

Gastroesophageal reflux disease progressing to achalasia

Two achalasia patients with former complaints of heartburn were examined. Antisecretory drugs were used by the patients when dysphagia occurred. Barium X-ray and esophageal manometry were performed and achalasia was diagnosed in both patients. Twenty-four-hour pH-metry showed significant and long-lasting acid reflux during supine position. Prolonged reflux episodes can be explained not only by the swallow-unrelated transient relaxation of lower esophageal sphincter (LES) and mechanical damage of the esophageal body, but also by its chemical insensitivity. Thus preoperative detection of reflux should determinate either the operational procedure and the postoperative follow up of the patient.

Histology of esophageal mucosa from patients with achalasia

When achalasia becomes far advanced and leads to esophageal resection, inflammation of the esophageal mucosa is almost universal. The histology of the esophageal mucosa in less advanced cases of achalasia has not been firmly established. We have studied endoscopic biopsies obtained during evaluation of patients with achalasia. Two to four endoscopic biopsies from the lower esophagus of 26 patients with manometrically verified achalasia were mounted on mesh, serially sectioned, stained, coded and interpreted by two independent observers using recognized criteria. The histological findings were correlated with clinical data. Ten of 26 patients had at least one abnormal biopsy. Five of these 10 patients had a previous Heller myotomy; another patient had several pneumatic dilatations, and two other patients had endoscopically proven candida infections. Of the 16 patients with normal histology, four had prolonged stasis, five had heartburn and one patient had both heartburn and stasis. Unless the patient with achalasia has had a Heller myotomy, balloon dilatation, or a candida infection, the esophageal mucosa on biopsy appears to be within normal limits, even in patients with years of esophageal stasis or complaints of heartburn.