Esophageal Contraction Research Articles

Advances in the management of oesophageal motility disorders in the era of high-resolution manometry: a focus on achalasia syndromes.

This corrects the article DOI: 10.1038/nrgastro.2017.132.

Acotiamide Has No Effects on Esophageal Motor Activity or Esophagogastric Junction Compliance.

Background/AimsThe novel prokinetic drug acotiamide is used for treatment of functional dyspepsia. It is still unclear how acotiamide has effects on esophageal motor function. Esophageal peristalsis and esophagogastric junction (EGJ) compliance has an important role for prevention of esophageal mucosal damage caused by gastroesophageal reflux, however, few studies have analyzed the effects of acotiamide on those former activities and none have investigated its effects on EGJ compliance. The aim of our research was to examine the effects of acotiamide on esophageal motility and EGJ compliance.MethodsWe enrolled 3 gastroesophageal reflux disease (GERD) patients as well as 9 healthy volunteers. Using high-resolution manometry, we examined esophageal motor activity parameters, including esophageal body contractions and lower esophageal sphincter (LES) pressure. While, EGJ compliance was evaluated using a functional lumen imaging probe. Following determination of baseline values for esophageal motor activities and EGJ compliance, acotiamide at a standard dose of 300 mg/day was administered for 3 days. All measurements were performed again 2 hours after the last acotiamide administration.ResultsIn the healthy volunteers, as compared with the baseline values, acotiamide administration did not significantly change esophageal body contractions and LES pressure. And EGJ distensibility was not significantly changed (distensibility index in 40-mL distension: 3.5 ± 0.4 vs 3.3 ± 0.5 mm2/mmHg). Similarly in the GERD patients, there were no differences in either esophageal motility or EGJ compliance between before and after acotiamide administration (distensibility index in 40-mL distension: 6.2 ± 0.5 vs 6.5 ± 1.1 mm2/mmHg).ConclusionIn both healthy individuals and GERD patients, standard dose acotiamide dose does not have significant effects on esophageal motor activities or EGJ compliance.

A case report of achalasia

Achalasia is characterized by esophageal nonperistaltic contraction and incomplete relaxation of the lower esophageal sphincter. The most common symptom are dysphagia, regurgitation, and heartburn. A 48 years old male was admitted into HAM General Hospital Medan with achief complaint of dysphagia since adulthood. The patient had to drink a lot of water to help swallow solid or soft food. Complaint worsened in the last three months followed by odynophagia, nausea, and vomiting undigested, retained food. The patient also complained about heartburn and was previously diagnosed with a variant of angina pectoris but his symptoms didn’t improve with medication. The patient had a history of weight loss but no anorexia, no prior history of corrosive ingestion. The patient was an active smoker. Physical examination revealed no abnormality. Oesophagogram showed dilated distal esophagus with rat tail appearance. Gastroscopy revealed dilatation on the lower third of the esophagus. Computed Tomography revealed dilatation of distal esophagus. Based on the results of the exams, we concluded the diagnosis as achalasia. The patient was treated with calcium channel blocker and proton pump inhibitor. The patient showed clinical improvement after treated and was discharged. The patient was planned for once a month follow up in the outpatient clinic.

Esophagogastric junction and esophageal body contraction metrics on high-resolution manometry predict esophageal acid burden.

Distal contractile integral (DCI) and esophagogastric junction contractile integral (EGJ-CI) are high-resolution manometry (HRM) software metrics assessing esophageal motor function in gastroesophageal reflux disease (GERD). Patients undergoing HRM and ambulatory pH monitoring off antisecretory therapy prospectively completed symptom questionnaires assessing symptom burden and a global symptom score (GSS) at baseline and after GERD therapy. DCI<450mmHg/cm/s in ≥5 swallows diagnosed ineffective esophageal motility (IEM); proportions of failed (DCI<100mmHg/cm/s) and weak (DCI 100-450mmHg/cm/s) sequences were separately assessed. EGJ-CI assessed vigor of the EGJ barrier. Univariate and multivariate analyses addressed performance of esophageal body and EGJ metrics in predicting abnormal esophageal reflux burden, and symptom outcome from antireflux therapy. Of 188 patients (55.2±0.9year, 64% F), 42.6% had low EGJ-CI, and 25.0% had IEM. While low EGJ-CI was associated with abnormal reflux burden (P=0.003), IEM alone was not (P=0.2). Increasing proportions of failed swallows predicted abnormal AET better than the current IEM definition. Combined low EGJ-CI and IEM segregated abnormal total and supine acid burden compared to patients with normal EGJ-CI and no IEM (P≤0.007 for each comparison). Medical therapy and surgical antireflux therapy were similarly effective in improving symptom burden; surgery resulted in better outcomes with low EGJ-CI (P≤0.04), especially with intact esophageal body motor function (P=0.02). While abnormal EGJ and esophageal body metrics are collectively associated with elevated esophageal reflux burden, increasing proportions of failed swallows are better predictors of reflux burden and outcome compared to the current IEM definition.

Swallow-induced esophageal shortening in patients without hiatal hernia is associated with gastroesophageal reflux.

Longitudinal esophageal body shortening with swallow-induced peristalsis has been reported in healthy individuals. Esophageal shortening is immediately followed by esophageal re-elongation, and the lower esophageal sphincter (LES) returns to the baseline position. High-resolution manometry (HRM) allows for objective assessment of extent of shortening and duration of shortening. In patients without hiatal hernia at rest, swallow-induced esophageal shortening can lead to transient hiatal hernia (tHH) which at times may persist after the completion of swallow. This manometric finding has not been investigated in the literature, but a question arises whether this swallow-induced transient herniation can effect on the likelihood of gastroesophageal reflux. This study aims to assess the relationship between gastroesophageal reflux and the subtypes of swallow-induced esophageal shortening, i.e. tHH and non-tHH, in patients without hiatal hernia at rest. After Institutional Review Board (IRB) approval, we queried a prospectively maintained database to identify patients who underwent HRM evaluation and 24-hour pH study between January to December 2015. Patients with type-I esophagogastric junction (EGJ) morphology (i.e. no hiatal hernia) according to the Chicago classification v3.0 were included. The patterns of the esophageal shortening with swallows were divided into two subtypes, i.e. tHH and non-tHH. tHH was defined as an EGJ double high-pressure zones (≥1 cm) at the second inspiration after the termination of swallow-induced esophageal body contraction. The number of episodes of tHH was counted per 10 swallows and tHH size was measured for each patient. In total, 41 patients with EGJ morphology Type-I met the inclusion criteria. The mean age was 47.2 years, 35 patients (85.4%) were women, and the mean body mass index was 33.9 kg/m2. The mean number of tHH episodes was 3 out of 10 swallows; mean maximal tHH size was 1.3 cm. Patients who had tHH in ≥3 out of 10 swallows (n=16; 39.0%) were more likely to have abnormal DeMeester scores than patients with <3 swallows (56% vs. 28%; P=0.070). Patients with maximal tHH ≥2 cm in at least 1 swallow (n=17; 41.5%) were more likely to experience pathological reflux than patients with maximal tHH <2 cm (59% vs. 25%; P=0.029). In conclusion, we showed that, in a subset of patients with Type-I EGJ morphology, swallowing induced transient EGJ double high-pressure zones (≥1 cm) after peristalsis. We have named this new manometric finding the swallow-induced tHH. A high prevalence of pathological reflux disease was observed in patients with maximal tHH ≥2 cm. The degree of swallow-induced tHH could be an early indicator of lower esophageal sphincter dysfunction in patients without manometric hiatal hernia.

Changes in the interstitial cells of Cajal and neuronal nitric oxide synthase positive neuronal cells with aging in the esophagus of F344 rats.

The aging-associated cellular and molecular changes in esophagus have not been established, yet. Thus we evaluated histological structure, interstitial cells of Cajal (ICCs), neuronal nitric oxide synthase (nNOS)-positive cells, and contractility in the esophagus of Fischer 344 rat at different ages (6-, 31-, 74-weeks, and 2-years). The lamina propria thickness and endomysial area were calculated. The immunoreactivity of c-Kit, nNOS and protein gene product (PGP) 9.5 was counted after immunohistochemistry. Expression of c-Kit, stem cell factor (SCF), nNOS and PGP 9.5 mRNA was measured by real-time PCR, and expression of c-Kit and nNOS protein was detected by Western blot. Isovolumetric contractile force measurement and electrical field stimulation (EFS) were conducted. The lamina propria thickness increased (6 week vs 2 year, P = 0.005) and the endomysial area of longitudinal muscle decreased with aging (6 week vs 2 year, P<0.001), while endomysial area of circular muscle did not significantly decrease. The proportions of NOS-immunoreactive cells and c-Kit-immunoreactive areas declined with aging (6 week vs 2 year; P<0.001 and P = 0.004, respectively), but there was no significant change of PGP 9.5-immunopositiviy. The expressions of nNOS, c-Kit and SCF mRNA also reduced with aging (6 week vs 2 year; P = 0.006, P = 0.001 and P = 0.006, respectively), while the change of PGP 9.5 mRNA expression was not significant. Western blot showed the significant decreases of nNOS and c-Kit protein expression with aging (6 week vs 2 year; P = 0.008 and P = 0.012, respectively). The EFS-induced esophageal contractions significantly decreased in 2-yr-old rat compared with 6-wk-old rats, however, L-NG-Nitroarginine methylester did not significantly increase the spontaneous and EFS-induced contractions in the 6-wk- and 2-yr-old rat esophagus. In conclusion, an increase of lamina propria thickness, a decrease of endomysial area, c-Kit, SCF and NOS expression with preserved total enteric neurons, and contractility in aged rat esophagus may explain the aging-associated esophageal dysmotility.

Gastrointestinal Involvement in Systemic Sclerosis: An Update.

Gastrointestinal Involvement in Systemic Sclerosis: An Update.

Differences between idiopathic and chagasic achalasia

Idiopathic and Chagas’ disease achalasia are characterized by absent or partial lower esophageal sphincter relaxation, absence of peristaltic esophageal contraction, food retenction in the esophagus and esophageal dilatation. The most frequent symptoms are dysphagia, regurgitation, heartburn, weight loss and non-cardiac chest pain. The diagnosis is made by radiologic examination and esophageal manometry, which is considered the most accurate exam to characterized achalasia. In both diseases there is destruction of the esophageal myenteric plexus. Despite similarities in clinical and manometric presentation there is evidence of greater loss of inhibitory neurons of the myenteric plexus in idiopathic achalasia, whereas in Chagas’ disease there is a loss of both excitatory and inhibitory neurons. Such differences, though do not affect patients’ clinical presentation, and hence treatment options should be the same for both diseases.

Difference of achalasia subtypes based on clinical symptoms, radiographic findings, and stasis scores

IntroductionThree subtypes of achalasia have been defined through high-resolution esophageal manometry: subtype i shows no pressurization with swallows, subtype ii has increased isobaric panesophageal pressure, and subtype iii has distal esophageal spastic non-isobaric contractions. Studies describing the subtypes based on radiographic findings, clinical symptoms, and stasis scores are limited. AimTo determine the differences in clinical symptoms, radiographic findings, and stasis scores for the 3 achalasia subtypes. MethodsPatients undergoing high-resolution esophageal manometry received a questionnaire about current symptoms and previous treatments. The questions included the presence of symptoms and their severity. Barium swallow tests were performed before the high-resolution esophageal manometry study to evaluate the maximum esophageal diameter. Stasis scores were calculated using the transit patterns on high-resolution esophageal manometry. ResultsOne hundred and eight patients with high-resolution esophageal manometry diagnosis of achalasia (n=8, subtype i; n=84, subtype ii; n=16, subtype iii) within the time frame of 1/2012-6/2015 were included in the study. Sex distribution was similar between the subtypes. Patient age was younger for subtype i (38±16 years), compared with subtypes ii (55±17 years) and iii (63±17 years) (P=.03). Esophageal symptoms did not differ between subtypes regarding the severity of nausea, chest pain, coughing, and heartburn, except for increased vomiting severity in subtype i (2.8±1.4 vs. 1.4±1.4 vs. 1.2±1.2, P<.01). A significant radiographic difference in esophageal dilation was seen between subtypes ii and iii (35.1±14.4 vs. 24.0±7.2mm, P=.023). Stasis scores did not significantly differ between the subtypes. ConclusionsAchalasia subtypes had similar clinical symptoms, except for increased vomiting severity in subtype i. The maximum esophageal diameter in subtype ii was significantly greater than in subtype iii. Esophageal stasis scores were similar. Thus, high-resolution esophageal manometry remains essential in assessing achalasia subtypes.

Pharyngeal swallowing and oesophageal motility during a solid meal test: a prospective study in healthy volunteers and patients with major motility disorders

The factors that determine how people eat when they are healthy or have disease have not been defined. We used high resolution manometry (HRM) to assess pharyngeal swallowing and oesophageal motility during ingestion of a solid test meal (STM) in healthy volunteers and patients with motility disorders. This study was based at University Hospital Zurich (Zürich, Switzerland). Healthy volunteers who responded to an advertisement completed HRM with ten single water swallows (SWS) in recumbent and upright positions followed by a 200 g rice STM in the upright position. Healthy volunteers were stratified for age and sex to ensure a representative population. For comparison, consecutive patients with major motility disorders on SWS and patients with dysphagia but no major motility disorders on SWS (disease controls) were selected from a database that was assembled prospectively; the rice meal data were analysed retrospectively. During STM, pharyngeal swallows were timed and oesophageal contractions were classified as representing normal motility or different types of abnormal motility in accordance with established metrics. Factors that could potentially be associated with eating speed were investigated, including age, sex, body-mass index, and presence of motility disorder. We compared diagnoses based on SWS findings, assessed with the Chicago Classification v3.0, with those based on STM findings, assessed with the Chicago Classification adapted for solids. These studies are registered with ClinicalTrials.gov, numbers NCT02407938 and NCT02397616. Between April 2, 2014, and May 13, 2015, 72 healthy volunteers were recruited and underwent HRM. Additionally, we analysed data from 54 consecutive patients with major motility disorders and 53 with dysphagia but no major motility disorders recruited between April 2, 2013, and Dec 18, 2014. We found important variations in oesophageal motility and eating speed during meal ingestion in healthy volunteers and patients. Increased time between swallows was accompanied by more effective oesophageal contractions (in healthy volunteers, 20/389 [5%] effective swallows at <4 s between swallows vs 586/900 [65%] effective swallows at >11 s between swallows, p<0·0001). Obstructive, spastic, or hypercontractile swallows were rare in healthy volunteers (total <1%). Patients with motility disorders ate slower than healthy volunteers (14·95 g [IQR 11-25] per min vs 32·9 g [25-40] per min, p<0·0001) and pathological oesophageal motility were reproduced when patients consumed the STM. In healthy volunteers, eating speed was associated only with frequency of swallows (slope 2·5 g per min per pharyngeal swallow per min [95% CI 1·1-4·0], p=0·0009), whereas in patients with dysphagia, it was correlated with frequency of effective oesophageal contractions (6·4 g per min per effective contraction per min [4·3-8·5], p<0·0001). Diagnostic agreement was good between the HRM with SWS and rice STM (intra-class correlation coefficient r=0·81, 95% CI 0·74-0·87, p<0·0001). Our results show normative values for pharyngeal swallowing and oesophageal motility in healthy volunteers. Detailed analysis of HRM data acquired during an STM shows that the rate-limiting factor for intake of solids in health is the frequency of pharyngeal swallowing and not oesophageal contractility. The reverse is true in patients with oesophageal motility disorders, in whom the frequency of effective oesophageal contractions determines eating speed. University Hospital Zurich.

Oesophageal manometry with a solid test meal: ready for prime time?

The decrement in quality of life to a patient with unexplained oesophageal symptoms cannot be overemphasised. A life lived with dysphagia or chest pain, without a specific diagnosis, can affect a patient on a daily basis (or even every meal). Evaluation usually begins with routine upper endoscopy. The addition of advanced imaging, a biopsy, or specialised brushing all too often fails to result in a conclusive diagnosis. Promising technologies to assess inflammation (ie, tissue impedance), 1 Ates F Yuksel ES Higginbotham T Mucosal impedance discriminates GERD from non-GERD conditions. Gastroenterology. 2015; 148: 334-343 Summary Full Text Full Text PDF PubMed Scopus (111) Google Scholar lower oesophageal sphincter distensibility, and motility (ie, endolumenal functional imaging probe) 2 Carlson DA Kahrilas PJ Lin Z et al. Evaluaiton of esophageal motility utilizing the functional lumenal imaging probe. Am J Gastroenterol. 2016; 111: 1726-1735 Crossref PubMed Scopus (137) Google Scholar are not ready for widespread use. The barium swallow is a lost art, providing variable information on motility, and is often performed without a solid bolus, limiting its usefulness. Diagnostic yield of high-resolution manometry with a solid test meal for clinically relevant, symptomatic oesophageal motility disorders: serial diagnostic studyThe diagnostic sensitivity of HRM for major motility disorders is increased with use of the STM compared with SWS, especially in patients with dysphagia. Observations made during STM can establish motility disorders as the cause of oesophageal symptoms. Full-Text PDF Pharyngeal swallowing and oesophageal motility during a solid meal test: a prospective study in healthy volunteers and patients with major motility disordersOur results show normative values for pharyngeal swallowing and oesophageal motility in healthy volunteers. Detailed analysis of HRM data acquired during an STM shows that the rate-limiting factor for intake of solids in health is the frequency of pharyngeal swallowing and not oesophageal contractility. The reverse is true in patients with oesophageal motility disorders, in whom the frequency of effective oesophageal contractions determines eating speed. Full-Text PDF

Treatments for achalasia in 2017: how to choose among them.

To review recent advances in achalasia diagnostics and therapeutics. The cardinal feature of achalasia, impaired lower esophageal sphincter (LES) relaxation, can occur in association with varied patterns of esophageal contractility. The Chicago Classification distinguishes among these as follows: without contractility (type I), with panesophageal pressurization (type II), with premature (spastic) distal esophageal contractions (type III), or even with preserved peristalsis [esophagogastric junction (EGJ) outlet obstruction]. Physiological testing also reveals achalasia-like syndromes that also benefit from achalasia therapies. Coincident with this has been the development of peroral endoscopic myotomy (POEM), an endoscopic technique for performing an esophageal myotomy. Hence, the option now exists to either selectively ablate the LES (pneumatic dilation, laparoscopic Heller myotomy, or POEM) or to ablate the sphincter and create a myotomy along some or the entire adjacent smooth muscle esophagus (POEM). Each achalasia syndrome has unique treatment considerations; type II achalasia responds well to all therapies, whereas type III responds best to POEM. Emerging data support the concept that optimal management of achalasia is phenotype-specific, guided by high-resolution manometry, and, in some instance, functional luminal imaging probe studies. This opinion article reviews the varied characteristic and treatment considerations of achalasia syndromes as currently understood.

Manometric Changes to the Lower Esophageal Sphincter After Magnetic Sphincter Augmentation in Patients With Chronic Gastroesophageal Reflux Disease.

To evaluate the manometric changes, function, and impact of magnetic sphincter augmentation (MSA) on the lower esophageal sphincter (LES). Implantation of a MSA around the gastroesophageal junction has been shown to be a safe and effective therapy for gastroesophageal reflux disease, but its effect on the LES has not been elucidated. Retrospective case control study (n = 121) evaluating manometric changes after MSA. Inclusion criteria consisted of a confirmed diagnosis of gastroesophageal reflux disease by an abnormal esophageal pH study (body mass index <35 kg/m, hiatal hernia <3 cm, and absence of endoscopic Barrett disease). Manometric changes, pH testing, and proton pump inhibitor use were assessed preoperatively and 6 and 12 months after MSA. MSA was associated with an overall increase in the median LES resting pressure (18 pre-MSA vs 23 mm Hg post-MSA; P = 0.0003), residual pressure (4 vs 9 mm Hg; P < 0.0001), and distal esophageal contraction amplitude (80 vs 90 mm Hg; P = 0.02). The percent peristalsis remained unaltered (94% vs 87%; P = 0.71).Overall, patients with a manometrically defective LES were restored 67% of the time to a normal sphincter with MSA. Those with a structurally defective or severely defective LES improved to a normal LES in 77% and 56% of patients, respectively. Only 18% of patients with a normal preoperative manometric LES deteriorated to a lower category. MSA results in significant manometric improvement of the LES without apparent deleterious effects on the esophageal body. A manometrically defective LES can be restored to normal sphincter, whereas a normal LES remains stable.

Significance of VIP and VIP receptor interaction in promoting pathogenesis of Eosinophilic esophagitis

Abstract Vasoactive intestinal peptide (VIP) is shown to have a role in the esophageal sphincter contraction and relaxation, and its role in pathogenesis of eosinophil associated allergic diseases like asthma and rhinitis is reported. Therefore, we tested the hypothesis that VIP may have an important role in the eosinophils accumulation in the esophagus that promote the pathogenesis of eosinophilic esophagitis (EoE). Accordingly, we performed flow cytometer analysis for VIP receptors expression in the blood eosinophils and real time PCR for VIP transcript analysis in the biopsies of human EoE. Herein, we show that human eosinophils highly express VIP associated receptor CRTH2, not VAPC1 or VAPC2. Further, VIP mRNA and protein is induced in esophageal biopsies of human EoE compare to the normal individuals. Additionally, we show that in vitro VIP has a similar chemoattractant activity for eosinophils as eotaxin. Further, we show that in vivo CRTH2 expressed eosinophils accumulated around the VIP producing nerves in the esophageal biopsies of EoE patients. Interestingly, we also observed VIP receptor VPAC2 on mast cells and their accumulation near the nerve cells in EoE biopsies. Taken together, we show the significance of VIP and its receptors interaction in the recruitment of eosinophils and mast cells that may have an important role in promoting chronic EoE pathogenesis in human.

665 - Cholecystokinin Induces Esophageal Longitudinal Muslce Contraction and Transient Lower Esophageal Relaxation in Normal Healthy Subjects

665 - Cholecystokinin Induces Esophageal Longitudinal Muslce Contraction and Transient Lower Esophageal Relaxation in Normal Healthy Subjects

Sa1658 - The Timed Barium Esophagram Surface Area Correlates with Symptom Improvement Better than Column Height Following Treatment in Achalasia

Introduction Timed barium esophagram (TBE) is an objective measurement of esophageal emptying in achalasia. Post-therapy reduction of residual barium column height correlates imperfectly with short term symptomatic outcomes. We hypothesise that surface area (SA) of the barium column may be more accurate than height; firstly, by incorporating improvement in esophageal width that often occurs post-therapy, but also by correcting for artificially higher height values due to esophageal contraction occurring. We aimed to compare the correlation of TBE outcome measures of height and SA with symptom improvement post-therapy. Method Achalasia patients who underwent therapy between 2015–6 and had TBE and Eckardt score (ES) performed at baseline as well as within 6 months post-therapy were included. TBE images were acquired 5 mins following ingestion of 200 mL barium. Barium height was measured between the gastro-esophageal junction and the superior extent of any residual barium column. After manually defining column boundaries, software was used to calculate SA. Adequate symptom relief was defined as ES reduction to ≤3. On TBE, metrics of adequate emptying evaluated were i) post-therapy column height 50% reduction in column height from pre to post-therapy and iii)>50% reduction in column SA from pre to post-therapy. Results Of 18 patients, 11 had dilatation and 7 POEM. Reductions with therapy of both 5 min barium column height (14.7±8.7 to 7.9±6.0 cm; p=0.01) and SA (52.7±43.5 to 24.5±26.0cm2; p=0.02) were noted. Symptoms also improved; median baseline ES 7 (IQR 5.25–8) improved to 0 (IQR 0–1) post-therapy. However there was poor concordance between post-therapy barium height and symptomatic relief (i.e. post-therapy column >5 cm despite ES ≤3 or vice versa), and the correlation (R) between these two variables was poor. Similar poor concordance was seen when adequate emptying was defined by >50% reduction in column height, but >50% reduction in SA paralleled symptom relief most closely. Conclusion In TBE performed on achalasia patients post-therapy, reduction in SA of the residual barium column compared with baseline values parallels symptomatic relief more closely than reduction of column height. Disclosure of Interest None Declared

Etiology and Pathogenesis of Idiopathic Achalasia.

This review examines the etiology and pathogenesis of idiopathic achalasia. This disease is clinically characterized by dysphagia of solids and liquids due to the presence of simultaneous or absent esophageal contractions and impaired or absent relaxation of the lower esophageal sphincter. It includes a review of (a) etiology and pathogenesis of this inflammatory process that damage the ganglion cells of the Auerbach plexus that is limited to the esophagus; (b) genetic abnormalities and polymorphisms associated with this disease that may help explain its heterogeneity expressed by the different motility abnormalities of its phenotypes as well as differences in its clinical progression. These different genetic abnormalities may be responsible for the slow progression of types I or II phenotypes; (c) indirect evidence of viruses present in these patients that may initiate its development; (d) the abnormalities of the muscle layer that may be responsible for the dilation of the body of the esophagus that ultimately causes the sigmoid-like esophagus in the very last phase of this disease. This progression to the end-stage phase tends to occur in about 5% of patients. And, (e) the chronic inflammatory abnormalities in the squamous mucosa that may be the cause of the dysplastic and neoplastic changes that may lead to squamous cell carcinoma whose incidence in this disease is increased. These mucosal abnormalities are usually present in patients with markedly dilated body of the esophagus and severe food stasis.

The Effect of Acute Stress on Esophageal Motility and Gastroesophageal Reflux in Healthy Humans.

Background/AimsLittle research has been done to evaluate the effect of stress in exacerbating the symptoms associated with gastroesophageal reflux (GER). We aimed to investigate the effect of acute stress on esophageal motility and GER parameters in healthy volunteers.MethodsA total of 10 (M:F = 8:2, median age 34 years-old) healthy volunteers without any recurrent gastrointestinal symptoms participated in this study. They underwent esophageal high-resolution manometry with 10 wet swallows (Experiment I) and esophageal impedance-pH monitoring (Experiment II) in the basal period and in the stress period. In the stress period, either real stress or sham stress was given in a randomized cross-over design. The stress scores, symptom severity, and pulse rates were measured.ResultsThe stress scores and the severity of nausea were significantly greater under real stress, compared with sham stress. The percentages of weak, failed, rapid, premature, and hyper-contractile contractions were not significantly altered during real stress and during sham stress, compared with the basal period. The median resting pressure of the lower esophageal sphincter and distal contractile integral of esophageal contractions did not differ in the stress period, compared with the basal period. Contractile front velocity and distal latency of esophageal peristaltic contractions were significantly changed during real stress, which was not observed during sham stress. GER parameters were not significantly altered during real stress and during sham stress.ConclusionAlthough acute auditory and visual stress seems to affect esophageal body motility, it does not induce significant motor abnormalities or increase GER in healthy humans.

Radionuclide Esophageal Transit Scintigraphy in Primary Hypothyroidism.

Background/AimsEsophageal dysmotility is associated with gastrointestinal dysmotility in various systemic and neuroregulatory disorders. Hypothyroidism has been reported to be associated with impaired motor function in esophagus due to accumulation of glycosaminoglycan hyaluronic acid in its soft tissues, leading to changes in various contraction and relaxation parameters of esophagus, particularly in the lower esophageal sphincter. In this study we evaluated esophageal transit times in patients of primary hypothyroidism using the technique of radionuclide esophageal transit scintigraphy.MethodsThirty-one patients of primary hypothyroidism and 15 euthyroid healthy controls were evaluated for esophageal transit time using 15–20 MBq of Technetium-99m sulfur colloid diluted in 10–15 mL of drinking water. Time activity curve was generated for each study and esophageal transit time was calculated as time taken for clearance of 90% radioactive bolus from the region of interest encompassing the esophagus. Esophageal transit time of more than 10 seconds was considered as prolonged.ResultsPatients of primary hypothyroidism had a significantly increased mean esophageal transit time of 19.35 ± 20.02 seconds in comparison to the mean time of 8.25 ± 1.71 seconds in healthy controls (P < 0.05). Esophageal transit time improved and in some patients even normalized after treatment with thyroxine. A positive correlation (r = 0.39, P < 0.05) albeit weak existed between the serum thyroid stimulating hormone and the observed esophageal transit time.ConclusionsA significant number of patients with primary hypothyroidism may have subclinical esophageal dysmotility with prolonged esophageal transit time which can be reversible by thyroxine treatment. Prolonged esophageal transit time in primary hypothyroidism may correlate with serum thyroid stimulating hormone levels.

Evaluation of Esophageal Functions by Manometry in Iron Deficiency Anemia Patients.

BackgroundThe aim of this study was to investigate whether any esophageal motor dysfunction exists in patients with iron deficiency anemia (IDA).MethodsThe study included 39 patients (34 women, mean age: 44.17 ± 14.21 years) who met WHO diagnostic criteria for IDA. An additional 30 functional dyspepsia patients were also included as a control group. Esophageal motility testing was performed; esophagus contraction amplitude, peak velocity, contraction time, lower esophageal sphincter (LES) resting pressure, LES relaxation, and LES relaxation duration were assessed.ResultsA majority (76.4%) of patients had at least one IDA symptom, such as reflux, chest pain, or dysphagia. Manometric findings in IDA patients vs. controls were as follows: mean LES resting pressure (mm Hg): 25.41 ± 11.67 vs. 19.96 ± 6.58 (P = 0.025); mean esophageal contraction amplitude (mm Hg): 61.61 ± 24.21 vs. 63.23 ± 18.86 (P = 0.764); mean LES relaxation duration (s, x ± SD): 5.33 ± 1.61 vs. 8.75 ± 1.86 (P = 0.000); mean LES relaxation (%): 93.30 ± 9.88 vs. 95.53 ± 5.81 (P = 0.278); mean peak velocity (cm/s): 12.67 ± 37.95 vs. 3.50 ± 1.63 (P = 0.191). Esophageal dysmotility was found in 11 (28.2%) IDA patients. Non-specific esophageal motor disorder was found in three patients, hypomotility of the esophagus was found in three patients, achalasia was found in two patients, hypertensive LES was found in two patients, and hypotensive LES was found in one patient.ConclusionLES resting pressure was higher and LES relaxation duration was shorter in patients with IDA. Esophageal dysmotility was present in 28.2% of the patients with IDA A little more than half of patients had dysphagia symptoms. IDA may contribute to esophageal motility dysfunction and esophageal symptoms.