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Table of Contents
CASE REPORT
Year : 2018  |  Volume : 19  |  Issue : 1  |  Page : 12-15  

A rare case of left atrial myxoma vascularity causing acquired coronary cameral fistula: Role of transesophageal echocardiography


Department of Cardiac Anaesthesiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Bengaluru, Karnataka, India

Date of Web Publication10-May-2018

Correspondence Address:
Dr. S Subash
Department of Cardiac Anaesthesiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Jayanagar 9th Block, Bengaluru - 560 069, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/HEARTVIEWS.HEARTVIEWS_79_17

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   Abstract 


Left atrial myxoma is the common benign tumor of heart. Coronary arteries may supply these tumor. Considering the vascular nature of the tumor, acquired coronary cameral fistula(CCF) can be a possibility postexcision of the left atrial myxoma. Here, we discuss a case of 53-year-old female patient, who developed acquired CCF, following excision of the tumor and the role of transesophageal echocardiography intraoperatively in diagnosis.

Keywords: Acquired coronary cameral fistula, coronary cameral fistula, left atrial myxoma, transesophageal echocardiography


How to cite this article:
Subash S, Thimmarayappa A, Patel GP, Dhananjaya M, Gopal D, Manjunatha N. A rare case of left atrial myxoma vascularity causing acquired coronary cameral fistula: Role of transesophageal echocardiography. Heart Views 2018;19:12-5

How to cite this URL:
Subash S, Thimmarayappa A, Patel GP, Dhananjaya M, Gopal D, Manjunatha N. A rare case of left atrial myxoma vascularity causing acquired coronary cameral fistula: Role of transesophageal echocardiography. Heart Views [serial online] 2018 [cited 2019 Oct 16];19:12-5. Available from: http://www.heartviews.org/text.asp?2018/19/1/12/232159




   Introduction Top


Coronary cameral fistula (CCF) can be congenital or acquired. The most common types are congenital in origin. Acquired CCF can occur during trauma, therapeutic intervention, or surgical intervention. We hereby report a case of LA myxoma, developing acquired CCF after excision of the tumor. The incidence of CCF neovascularization of the tumor and the intraoperative role of TEE in its effective management.


   Case Presentation Top


A 53-year-old, asymptomatic female with no significant past medical history was diagnosed to have a mass in the left atrium (LA) on routine cardiac evaluation. Transthoracic echocardiography revealed a mass of size 1.5 cm × 2.6 cm in LA attached to the interatrial septum (IAS). Considering patient's age, coronary angiography was done which showed normal coronary arteries and a tumor blush due to feeding arteries supplying the LA mass. Coronary angiography also showed feeding arteries arising from the left circumflex (LCX) and left anterior descending vessels (LAD) [Figure 1]. The patient was posted for excision of LA mass.
Figure 1: Right anterior oblique view showing tumor blush

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The patient was induced as per the standard anesthesia protocol and a TEE probe was introduced without any difficulty. Precardiopulmonary bypass (CPB) TEE examination demonstrated a homogenous and irregularly-shaped mass in the LA of size 2.4 cm × 2.2 cm arising not only from IAS [Figure 2] but also seen attached to the roof of LA, without prolapsing through the mitral valve. The aforementioned findings were confirmed by the surgeon intraoperatively.
Figure 2: Mid-esophageal aortic valve short-axis view showing tumor (M) attached to interatrial septum. LA: Left atrium, RA: Right atrium

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Under standard hypothermic CPB with cold blood hyperkalemic cardioplegia, the LA mass was excised through the right atrial approach, and IAS was reconstructed using pericardial patch. The patient was weaned from CPB without any pharmacological support. Postprocedure, TEE showed complete excision of LA mass and absence of flow across IAS. However, an unusual single continuous jet with a peak velocity of 0.9 m/s was seen from LA roof into the LA chamber near the opening of right pulmonary vein [Figure 3] and [Video 1]. With a suspicion of CCF, the coronary arteries were looked at, for any dilated course by direct visualization on the surface of the heart as well as on TEE and found that the coronary arteries were not dilated. The possibility of tumor-feeding vessel draining into LA was considered and protamine was administered with simultaneous monitoring of the continuous jet using TEE. Thirty-five minutes after administration of protamine, there was a gradual decrease in magnitude of flow as well as velocity of the jet which finally disappeared [Video 2]. The postoperative course was uneventful, and the patient was extubated after 6 h of mechanical ventilation. Postoperative TTE did not reveal any unusual flow in LA. Histopathological examination confirmed the diagnosis of myxoma. One-year follow-up of the patient showed no recurrence of myxoma and ventricular dysfunction.
Figure 3: Mid-esophageal four-chamber view with LA focus and color Doppler showing single turbulent jet at Nyquist limit - 50 cm/s. LA: Left atrium, RA: Right atrium, IAS: Interatrial septum

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   Discussion Top


The most common tumors of the heart are myxomas, accounting for 50% of benign primary cardiac tumours.[1] Myxomas are commonly seen in LA (85%) followed by the right atrium (10%) and the ventricles (5%).[2] Left atrial myxoma is a vascular tumor and vascularity was first reported by Marshal et al.[3] RCA and LCX equally supply left atrial myxoma [4] and 37%–56% of neovascularization is detectable angiographically.[5] However, in our case, the tumor was seen supplied by LAD and LCX.

CCF can be congenital or acquired. Acquired CCF is divided into spontaneous and traumatic types. Traumatic fistulas are further subdivided into iatrogenic and accidental subtypes.[6] CCF most commonly arises from RCA (50%–55%) followed by 35% from LCA and 5% from both coronaries. More than 90% of fistulas open into right heart chambers and about 8% of fistula drain into left heart chambers.[7] In our case, the continuous jet into LA was an acquired CCF caused by untied feeding vessel from LAD and LCX supplying the LA myxoma.

In our case, after administration of protamine, the continuous jet disappeared. Spontaneous disappearance of CCF flow has been documented in acquired iatrogenic CCF following endomyocardial biopsy and surgical septal myectomy.[8],[9] This was probably because of clot formation in the feeding artery responsible for the fistula. If the abnormal flow would have been persistent in our case, either coil embolization [10] or surgical ligation [11] of the fistulous tract without compromising the parent coronary blood flow would have been done to avoid coronary steal phenomenon.[12]

When a significant CCF is left untreated, it can lead to complications such as dyspnea, fatigue, myocardial ischemia, congestive heart failure, infective endocarditis, and even sudden death. TEE is a very helpful tool intraoperatively not only to diagnose CCF but also to confirm the surgical closure of the fistulous tract as well as to detect any new regional wall motion abnormalities following accidental clamping of the parent coronary artery. However, the major pitfall with TEE is that the whole coronary fistulous tract cannot be traced. In our case, TEE was useful in visualization and follow-up of the continuous flow due to feeding artery of the LA myxoma.


   Conclusion Top


Intraoperative TEE helps in diagnosing neovascularization of LA myxoma and acquired CCF. The color Doppler on the tumor mass can be useful to evaluate the intratumor blood flow. After excision of neovascularized LA myxoma with attachment from LA roof, abnormal flow from the feeding artery supplying tumor bed should be anticipated in TEE examination. Surgical ligation of the larger feeding artery should be done intraoperatively along with excision of tumor mass.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
   References Top

1.
Ha JW, Kang WC, Chung N, Chang BC, Rim SJ, Kwon JW, et al. Echocardiographic and morphologic characteristics of left atrial myxoma and their relation to systemic embolism. Am J Cardiol 1999;83:1579-82, A8.  Back to cited text no. 1
[PUBMED]    
2.
Demir M, Akpinar O, Acarturk E. Atrial myxoma: An unusual cause of myocardial infarction. Tex Heart Inst J 2005;32:445-7.  Back to cited text no. 2
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3.
Marshall WH Jr., Steiner RM, Wexler L. “Tumor vascularity” in left atrial myxoma demonstrated by selective coronary arteriography. Radiology 1969;93:815-6.  Back to cited text no. 3
    
4.
Van Cleemput J, Daenen W, De Geest H. Coronary angiography in cardiac myxomas: Findings in 19 consecutive cases and review of the literature. Cathet Cardiovasc Diagn 1993;29:217-20.  Back to cited text no. 4
[PUBMED]    
5.
Kim YK, Yong HS, Kang EY, Woo OH. Left atrial myxoma with neovascularization: Detected on cardiac computed tomography angiography. Int J Cardiovasc Imaging 2009;25 Suppl 1:95-8.  Back to cited text no. 5
[PUBMED]    
6.
Said SA, Schiphorst RH, Derksen R, Wagenaar LJ. Coronary-cameral fistulas in adults: Acquired types (second of two parts). World J Cardiol 2013;5:484-94.  Back to cited text no. 6
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7.
Ho HH, Cheung CW, Jim MH, Lam L. Images in cardiology: Coronary-cameral fistula. Heart 2005;91:1540.  Back to cited text no. 7
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8.
Sgalambro A, Olivotto I, Rossi A, Nistri S, Baldini K, Baldi M, et al. Prevalence and clinical significance of acquired left coronary artery fistulas after surgical myectomy in patients with hypertrophic cardiomyopathy. J Thorac Cardiovasc Surg 2010;140:1046-52.  Back to cited text no. 8
[PUBMED]    
9.
Sandhu JS, Uretsky BF, Zerbe TR, Goldsmith AS, Reddy PS, Kormos RL, et al. Coronary artery fistula in the heart transplant patient. A potential complication of endomyocardial biopsy. Circulation 1989;79:350-6.  Back to cited text no. 9
[PUBMED]    
10.
Basit A, Nazir R, Agarwal A. Unusual case of surgically failed coronary-cameral fistula: Successful outcome with transradial coil embolization. J Invasive Cardiol 2013;25:56-7.  Back to cited text no. 10
[PUBMED]    
11.
Ata Y, Turk T, Bicer M, Yalcin M, Ata F, Yavuz S, et al. Coronary arteriovenous fistulas in the adults: Natural history and management strategies. J Cardiothorac Surg 2009;4:62.  Back to cited text no. 11
    
12.
Geller CM, Dimitrova KR, Hoffman DM, Tranbaugh RF. Congenital coronary artery fistulae: A rare cause of heart failure in adults. J Cardiothorac Surg 2014;9:87.  Back to cited text no. 12
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    Figures

  [Figure 1], [Figure 2], [Figure 3]



 

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