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Esophago-pericardial Fistula Induced Community Acquired Methicillin Resistant Staphylococcus Aureus (CA-MRSA) Cardiac Tamponade - A Rare Case Report and Literature Review

Pramod Theetha Kariyanna, Apoorva Jayarangaiah, Ronald Pedalino, Sudhanva Hegde, Jonathan D. Marmur, Aarti Shenoy, Michael Ashamalla, Justina Ray, Samy I. McFarlane*

Divisions of Cardiovascular Disease, Endocrinology and Nephrology, Department of Internal Medicine, State University of New York, Downstate Medical Center, Brooklyn, New York, U.S.A- 11203

Abstract: Community acquired methicillin resistant Staphylococcus aureus (CA-MRSA) infection is a matter of public health concern. The incidence of community acquired Staphylococcus aureus (CA-MRSA) is rising. To date only 12 cases of CA-MRSA pericarditis and seven cases of esophageal cancer related purulent pericarditis have been reported. We here present a 54 year old woman who presented with cardiac tamponade that was noted to be purulent and in whom esophagopericardial fistula secondary to squamous cell esophageal cancer was discovered subsequently. Purulent pericardial fluid subsequently grew MRSA. Patient succumbed despite appropriate management with antibiotics.

Keywords: esophago-pericardial fistula, MRSA, cardiac tamponade, esophageal cance

Citation: Pramod Theetha Kariyanna, Apoorva Jayarangaiah, Ronald Pedalino, Sudhanva Hegde, Jonathan D. Marmur, Aarti Shenoy, Michael Ashamalla, Justina Ray, Samy I. McFarlane, Esophago-pericardial Fistula Induced Community Acquired Methicillin Resistant Staphylococcus Aureus (CA-MRSA) Cardiac Tamponade - A Rare Case Report and Literature Review. American Journal of Medical Case Reports, 6 (6). 109-113. January 2018. doi:10.12691/ajmcr-6-6-3

1. Introduction

The infection rates of hospital acquired methicillin resistant Staphylococcus aureus (MRSA) have been stable recently; in contrast, the incidence of community acquired methicillin resistant Staphylococcus aureus (CA-MRSA) is increasing in alarming rates [1]. CA-MRSA is a very rare cause of pericarditis and to date only 12 cases have been reported. We present a case of a suppurative cardiac tamponade caused by CA-MRSA pericarditis in a 54 year old African- American female. She was subsequently found to have squamous cell carcinoma of the esophagus that led to a fistula into the pericardium resulting in the development of CA-MRSA cardiac tamponade.

2. Case Report

A 54 year old postmenopausal female with past medical history of 35 pack years history of smoking and alcohol abuse presented with worsening dyspnea for four months, decrease in exercise tolerance to one block from four blocks four months ago, loss of appetite and 41 pound weight loss and worsening bilateral lower limb swelling for four months. She had five episodes of bright red blood per rectum in last five weeks. She was afebrile at presentation, heart rate was 98 beats per minute, blood pressure was 121/50 mm Hg, and respiratory rate was 18 cycles per minute. Physical examination revealed jugular venous distension, distant heart sounds, rales were heard in all lung fields and bilateral lower limb edema till mid thighs. Investigations including complete blood count, comprehensive metabolic panel, venous blood gas. Investigations revealed anemia with hemoglobin at 10.7 g/dL, elevated white blood cell count at 9.7 X 10 ⁹/L with 82% neutrophils, hyponatremia (123 mEq/L), hyperkalemia (6.6 mEq/L), elevated blood urea nitrogen 128 mg/dL, serum creatinine 4.08 mg/dL, elevated liver enzymes (aspartate aminotransferase 118 u/L, alanine aminotransferase 122 u/Land alkaline phosphatase 237 u/L. A venous blood gas analysis revealed a pH of 7.219, pCO2 of 28.5 mm Hg, pO2 28.4 mm Hg, oxygen saturation of 32.6%, bicarbonate level of 8 mmol/L suggesting metabolic alkalosis. Electrocardiogram revealed sinus tachycardia and low voltage QRS complexes (Figure 1).

Figure 1. Electrocardiogram of the patient which revealed sinus tachycardia and low voltage QRS complexes

Figure 2. Chest X-ray showing increase in the cardiac silhouette

A chest X-ray obtained revealed enlarged cardiac silhouette (Figure 2). A bedside 2D transthoracic echocardiogram revealed large pericardial effusion with tamponade physiology. An emergent pericardial window was placed for pericardial fluid drainage by cardiothoracic surgery consultants in the operating room. The pericardial fluid was noted to be purulent hence ceftriaxone and vancomycin were started after obtaining two sets of blood cultures. Investigations have been listed in Table 1. Blood culture and serous pleural fluid cultures did not yield any growth, however pericardial fluid culture grew methicillin resistant Staphylococcus aureus (MRSA), hence vancomycin was continued. She had two more episodes of melena which raised the concern for gastrointestinal malignancy. Patient refused endoscopy and colonoscopy hence esophagogram and abdominal computed tomography (CT) was performed. Hence a esophagogram (Figure 3, Figure 4) was performed which revealed long irregular stricture involving thoracic esophagus with fistula to the pericardium. Endoscopic biopsy of the mass was consistent with squamous cell carcinoma (SCC) of the esophagus. A full body positive emission tomography (PET) scan revealed large hypermetabolic esophageal mass with multiple hypermetabolic foci noted inferior to the cervical spine, lower cervical lymph nodes, right pleura, left chest wall and multiple retropharyngeal lymph nodes (Figure 5). Multiple peritoneal adenopathy noted on CT abdomen were localized but obscure on PET scan. An esophageal stent was placed closed the esophago-pericardial fistula to maintain patency of the esophageal lumen (Figure 6). Patient signed do not resuscitate orders. Her hospital course was complicated by septic shock and she passed away from cardiac arrest.

Figure 3. Esophagogram showing luminal narrowing of the esophagus (red arrow) and pericardioesophageal fistula (blue arrow)

Figure 4. Esophagogram showing luminal narrowing of the esophagus (red arrow), pericardioesophageal fistula (blue arrow) and dye in the pericardium (green arrow)

Figure 5. Positive emission tomography (PET) scan revealed large hypermetabolic esophageal mass

Figure 6. Computed tomography revealing right and left pleural effusion and esophageal stent (blue arrow)

3. Discussion

Although the infection rates of hospital acquired methicillin resistant Staphylococcus aureus (HA- MRSA) has been stable recently, the incidence of community acquired Staphylococcus aureus (CA-MRSA) is increasing at alarming rates [1]. Cardiac tamponade is life threatening, slow or rapid compression of the heart due to the pericardial accumulation of fluid, pus, blood, clots or gas, as a result of effusion, trauma or rupture of the heart [2]. Purulent pericarditis is defined as an infection in the pericardial space that produces macroscopically or microscopically purulent material [3]. Primary purulent pericarditis is extremely rare, The mechanisms that lead to secondary purulent pericarditis are extension of infection from: intrathoracic site, intracardiac site, hematogenous spread, subdiaphragmatic site or trauma/surgery [4]. The incidence of purulent pericarditis in pre-antibiotic era was 1 in 254; in antibiotic era the incidence fell to 1 in 18,000 individuals [5,6]. Klacsmann et al review of 200 cases of purulent pericarditis revealed Streptococcus pneumoniae as the most common cause in pre-antibiotic era (1889-1943), with pneumonia being the most common primary source of infection; Staphylococcus aureus dominates the picture in post antibiotic era. Most of these cases of S.aureus purulent pericarditis were associated with thoracic surgery, chronic renal failure, diabetes, carcinomas [7]. Purulent pericarditis is always fatal if left untreated and even with appropriate treatment the mortality rate is 40% [8].

In recent years, hospital acquired MRSA (HA-MRSA) rates have been relatively stable while CA-MRSA infection rates are on the surge in various settings and patient population such as outpatient clinics, emergency department, children, native americans, aboriginal population, men who have sex with men and athletes [1]. It is debatable if CA-MRSA replaces or adds to the disease burden of its hospital counterpart [9]. To date only 12 cases of CA-MRSA purulent pericarditis have been reported. Most of these cases of CA-MRSA pericarditis were managed with pericardial drainage and antibiotics (Table 1) [9,10,11,12,13,14,15,16,17,18,19]. Esophageal cancer is a rare cause of purulent pericarditis and eight cases have been reported in the literature; MRSA was only reported by Gilles et al. (Table 2) [20,21,22,23,24,25,26].

Early diagnosis and management of CA-MRSA pericarditis/cardiac tamponade with pericardiocentesis and appropriate antibiotics can be life saving. This is of prime importance as MRSA pericarditis has a high mortality rate despite appropriate treatment [8]. The patient presented here had CA-MRSA cardiac tamponade secondary to per esophagopericardial fistula from SCC of esophagus. The patient never experienced fever despite having severe CA-MRSA infection, yet another atypical feature in presentation of a purulent infection. Milder and slower onset of cardiovascular symptoms and signs in this case can be explained by the ability of pericardium to accommodate huge amounts of fluid in slow onset chronic pericarditis and neurohumoral adjustment responses; cardiac tamponade sets in once the “last drop” phenomenon sets in [2].

Table 1. Cases of CA-MRSA purulent pericarditis reported in literature

Table 2. Cases of esophageal cancer that were associated with purulent pericarditis

4. Conclusion

To our knowledge, the case we present is the thirteenth reported case of CA-MRSA pericarditis and ninth ever reported case of purulent pericarditis due to esophageal cancer induced esophgopericardial fistula. The mortality rate of purulent pericarditis is high despite treatment [8]. Early diagnosis of CA-MRSA purulent cardiac tamponade/pericarditis could be life saving.

Acknowledgements

This work is supported, in part, by the efforts of Dr. Moro O. Salifu M.D., M.P.H., M.B.A., M.A.C.P., Professor and Chairman of Medicine through NIH Grant number S21MD012474.

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