Prevalence of Seropositive Anti-helicobacter Pylori Antibody in Patients with Coronary Artery Disease in Al-Najaf City

Khalid T. Altaae
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Keywords : Coronary Artery Disease,Al-Najaf City,Pylori Antibody,Seropositive Anti-helicobacter
Medical Journal of Babylon  10:4 , 2014 doi:1812-156X-10-4
Published :05 June 2014


Background: Helicobacter pylori (H.pylori), a bacterium involved in duodenal and gastric ulcers, gastric cancer, and MALT lymphoma pathogenesis, may causes numerous extragastric manifestations, including coronary artery disease. Objective: To determine the prevalence of positive antiH.pylori antibody in patients with coronary heart disease. Patients and Methods 80 patients with coronary artery diseases were engaged in this study.Patients with gastrointestinal problems or seemed to have symptoms & signs of peptic ulcer diseases were excluded from this study.All 80 patients were involved in a well –planned questionnaire including history of coronary artery diseases , history of systemic hypertension , diabetes mellitus, smoking , age , family history of CAD ,and hyperlipidemia.Blood samples were taken from all the patients and sent for a commercial rapid test of a latest generation of chromatographic immunoassay which utilize recombinant Cag-A antigens to detect the antibodies to H. pylori in human serum. Also the patients blood samples were sent for random plasma glucose & lipid profile. Results: Among 80 patients enrolled in this study ,43(53.75%) males and 37 (46.25%) females with variable age groups.Fifty percentage of all patients had acute attacks of CAD and the other half had chronic CAD ( identified by either by a new ischemic attack or during routine checkup).Testing for Anti H.pylori antibody in serum revealed that 31 (38.75%) of all patients had positive anti H.pylori antibody , while 49 (61.25%) had not.Sex variation among those with positive antiH.pylori showed no significant differences ( 15 males vs. 16 females).Strong association had been elicited between the occurrence of anti H. pylori antibody positivity and the presence of smoking and Hypertension as risk factors for CAD.5/31 (16.12%) of the positive antiHP antibody CAD patients had completely negative risk factor for CAD that made HP infection is significant & important trigger factor for CAD. Conclusions: There is a significant association between infection with and positive antiH.pylori antibody and the causation of coronary artery diseases which is more common in smoker& hypertensive patients. HP infection is important trigger factor for CAD.


Helicobacter pylori (H.pylori) is a slow–growing spiral Gram-negative flagellate urease-producing bacterium which plays a major role in gastritis and peptic ulcer diseases. Its complete genomic sequence is known. It is protected from gastric acid by the juxtamucosal mucous layer which traps bicarbonate secreted by antral cells. The prevalence of H.pylori is high in developing countries (80-90% of the populations) and much lower (20-50%) in developed countries. The incidence increases with age, probably due to acquisition in childhood when hygiene was poor and not due to infection in adult life. Infecting strain expresses CagA (cytotoxin-associated protein) and VacA ( vacuolating toxin) genes. CagA is a marker for a section of a bacterial DNA that contains gene responsible for a secretion system[1]. Infection with H.pylori and genetic alteration may contribute to the initial endothelial "injury" or dysfunction of the coronary arteries, which is believed to trigger atherogenesis [2]. Gastric mucosal damage caused by HP involves various bacterial and host-dependent toxic substances that have been recently associated with an increased risk of (CAD).HP infection induces platelet activation and aggregation that could be pathogenic explanation of association between HP infection and CAD [3]. Also There is a potentially important association with cerebrovascular disease. The strength of association is reduced if confounding factors are taken into account [4]. The classical risk factors for coronary disease may present in the patient with myocardial infarction irrespective of H.pylori status [5]. Nonendoscopic tests for detection of H.pylori infection include antibody test (serum) with sensitivity of 88-94% and specificity of 74-88% and it is inexpensive [6].

Materials and methods

In this prospective study, 80 patients with coronary artery diseases(CAD) in the two more common clinical forms (unstable angina UA, ST –segment elevation myocardial infarction STEMI) attending the Emergency room ,coronary care units (CCU) ,and consultation clininics) of AL-SADAR Teaching Hospital at AlNajaf city from October 2012 to June 2013, were engaged into this study to determine the prevalence of positive antiH.pylori antibody in their bloods. All patients entered a well –planned questionnaire including history of hypertension, diabetes mellitus, smoking, hyperlipidemia, and coronary artery diseases. All 80 patients must had:
*Negative history of peptic ulcer diseases (gastritis,duodenal ulcer ,and gastric ulcer).
*Negative long –term use of proton-pump inhibitors, antacids ,or NSAIDS)
Blood samples were obtained from all 80 patients and sent for lipid profile , blood sugar ,and rapid tests of chromatographic immunoassays which utilize recombinant CagA antigen to detect the antibodies to H.pylori.ECG were done for all patients to identify the onset ( acute or chronic), the sites (anterior ,inferior ,lateral) , and forms (UA ,or STEMI) of coronary artery diseases.Blood pressure was checked in all patients.The data & results were analysed and tables had been got regarding classification of patients according many variables including the prevalence of positive antiH.pylori antibody according to age, sex, onset, and other risk factors for coronary artery diseases.


80 patients entered this study, 43 (57.75%) males and 37 (42.25%) females and classified to age group (30 - ?70) years , to onset of coronary artery disease 40 (50% acute CAD) and 40(50% chronic CAD).Testing all 80 patients blood for AntiH.pylori AB showed that only 31(38.75%) had positive results ,while 49 (61.25%) had negative tests.Analysis of those patients with positive tests revealed the followings: The results above revealed that positive antiHP antibody more common in patients with unstable angina UA ( 74.19%) than in patients with STEMI (22.81%). The above results revealed that hypertension with smoking were the most common associated risk factors for CAD in positive antiHP cases. On the other hand, Those patients with completely negative history of risk factors compromised about 5 (16.12%) of positive cases which is a significant percentage that made infection with HP plays a role in pathogenesis of CAD.


AntiHP and type of CAD: in our study, patients with unstable angina with positive antiHP was 74.19% of the positive cases while STEMI about 25.81%.This result was different from a study was conducted by Jafarzadeh A and Esmaeeli-Nadimi A that revealed antiHP positivity was 86.7% in STEMI & 91.7% in Unstable angina [7]. AntiHP and CAD risk factors: we found that hypertension with smoking were the most common risk factors in positive antiHP CAD patients (10/31) cases, while a study made by Andreica V&Sandica-Andreica B showed that seum prevalence of antiHP was higher among smokers and alcoholic[8].These results could be explained by social and religious habits in our society. In our study , seropositivity to HP was found in 31/80 (38.75%) of the CAD.This finding is a little bit near what was deteced by Pieniazek P&Karczewska E (47.3%)[3].While studies investigating the specific molecular mimicry mechanisms induced by Helicobacter pylori strongly supported the association between H. pylori infection and ischemic heart disease,none of the studies performed so far did take into account the effect of the genetic susceptibility to develop ischemic heart disease or respond to H. pylori infection [9]. Finally, a significant & important finding detected in our study showed that positive antiHP in CAD patients without any risk factors was 5/31 (16.12%) which suggests that HP infection may play a role as a trigger factor in CAD as Aceti A&Are R identified [10].


*The prevalence of positive antiHP antibodies were higher in patients with unstable angina than patients with STEMI. *There is no gender variation in prevalence of positive anti HP CAD patients. *Hypertension& smoking were the most common risk factors for CAD in positive antitHP patients. *HP infection occurred in 16% of CAD with –ve risk factors which may make it a trigger factor for CAD


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3.Pieniazek P,Karczewska E,Duda A,Tracz W,Pasowicz M,Konturek Sj, Association of Helicobacter Pylori infection with coronary artery disease, Jagiellonian University, Cracow, Poland. 1999 Dec;50(5):743-51.

4.Fauci.Braunwald,Kasper ,Hurrison s Principles of Internal Medicine,Library of Congress Cataloging in Publication Data,17 th ed.,vol.(2);2008:946.

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8.Andreica V, Sandica-Andreica B, Draghici A, Chiorean E,Georoceanu A, Rusu M, The prevalence of anti -Helicobacter pylori antibodies in patients with ischemic heart disease. Luliu Hatieganu University of Medicine and Pharmacy,Cluj-Napoca, Romania.2004;42(1):183-9.

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10.Aceti A,Are R,Sabino G, Helicobacter Pylori active infection in patient with coronary heart disease, Sant s Andrea Hospital ,Rome, Italy.2004 Jul;49(1):8-12.

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