|Year : 2017 | Volume
| Issue : 1 | Page : 17-20
Role of multimodality imaging in postsurgical calcified aneurysm of patent ductus arteriosus
Daryoush Saed1, Anita Sadeghpour1, Azin Alizadehasl1, Hamidreza Pouraliakbar2, Ata Firouzi3, Saeid Hosseini4, Parvin Bayati2
1 Rajaie Cardiovascular Medical and Research Center, Echocardiography Research Center, Iran University of Medical Sciences, Tehran, Iran
2 Rajaie Cardiovascular Medical and Research Center, Radiology Research Center, Iran University of Medical Sciences, Tehran, Iran
3 Rajaie Cardiovascular Medical and Research Center, Interventional Research Center, Iran University of Medical Sciences, Tehran, Iran
4 Rajaie Cardiovascular Medical and Research Center, Cardiac Surgery Research Center, Iran University of Medical Sciences, Tehran, Iran
|Date of Web Publication||21-Jan-2019|
Dr. Anita Sadeghpour
Rajaie Cardiovascular Medical and Research Center, Echocardiography Research Center, Iran University of Medical Sciences, Tehran
Source of Support: None, Conflict of Interest: None
A patent ductus arteriosus (PDA) is a common congenital malformation in pediatric patients and accounts for 7%–10% of congenital heart diseases. The PDA is a posttricuspid shunt resulting from an arterial communication between the upper descending aorta and the distal pulmonary artery, is an important part of a normal fetal cardiac anatomy and usually closes spontaneously within 1 week after birth. Closure is indicated in patients with significant related symptoms, history of endarteritis, or dilation of the left atrium and/or the left ventricle (LV). Before the development of percutaneous PDA closure, surgical closure was recommended as the main routine treatment. An occasional occurrence is the recanalization of a surgically ligated ductus arteriosus, which may be associated with the serious complication of aneurysm formation. Herein, we report a rare case of a longstanding neglected PDA aneurysm as a complication of postsurgical PDA closure and discuss the weaknesses and strengths of cardiac imaging in this regard. A 31-year-old man with a history of surgical ligation of the PDA 20 years ago was referred to us for preoperative evaluation before elective noncardiac surgery. Electrocardiography revealed a normal sinus rhythm and an LV volume-overload pattern. Severe LV enlargement and moderate systolic dysfunction associated with a large residual PDA were found on transthoracic echocardiography. Cardiac catheterization and cardiac computed tomography angiography confirmed the presence of a calcified aneurysm of PDA, which was not suitable for percutaneous PDA closure. The patient underwent successful surgical closure without any residue or complications.
Keywords: Calcified aneurysm, endarteritis, heart failure, patent ductus arteriosus
|How to cite this article:|
Saed D, Sadeghpour A, Alizadehasl A, Pouraliakbar H, Firouzi A, Hosseini S, Bayati P. Role of multimodality imaging in postsurgical calcified aneurysm of patent ductus arteriosus. Arch Cardiovasc Imaging 2017;5:17-20
|How to cite this URL:|
Saed D, Sadeghpour A, Alizadehasl A, Pouraliakbar H, Firouzi A, Hosseini S, Bayati P. Role of multimodality imaging in postsurgical calcified aneurysm of patent ductus arteriosus. Arch Cardiovasc Imaging [serial online] 2017 [cited 2019 Apr 24];5:17-20. Available from: http://www.cardiovascimaging.com/text.asp?2017/5/1/17/238933
| Introduction|| |
A patent ductus arteriosus (PDA) is a common congenital malformation in pediatric patients and accounts for 7%–10% of congenital heart diseases. A PDA is a posttricuspid shunt originating from an arterial communication between the upper descending aorta and the distal pulmonary artery. The PDA is an important part of a normal fetal cardiac anatomy and usually closes spontaneously within 1 week after birth. The estimated incidence of PDAs is 56/100,000 live births.
Closure is indicated in any patient with heart failure symptoms or a history of endarteritis. Asymptomatic patients with the dilation of the left atrium or the left ventricle (LV) should also undergo PDA closure. Before the development of percutaneous PDA closure, surgical closure was recommended as the main routine treatment. The recanalization of a surgically ligated ductus arteriosus may be associated with the serious complication of aneurysm formation.
If diagnosis and/or treatment are delayed, complications such as growth failure, heart failure, bacterial endarteritis, and pulmonary hypertension may ensue with a concomitant significant increase in surgical morbidity and/or mortality. Furthermore, delay in appropriate treatment may lead to pulmonary vascular diseases (Eisenmenger syndrome) and render the patient inoperable. Transthoracic echocardiography has some limitations in precisely delineating the anatomy, but secondary effects of the PDA such as enlargement of left heart chambers and increased LV stroke volume could be certainly evaluated. Continuous-wave Doppler echocardiography illustrates continuous flow at the origin of the left pulmonary artery. Transesophageal echocardiography better delineates length and diameter of the PDA in some cases, while using three-dimensional (3D) echocardiography determines some types of PDA more accurately than 2D echocardiography. Although the PDA may be visible on computed tomography (CT) angiography, it requires ionizing radiation and intravenous contrast agents. Occasionally, calcification and/or aneurysm formation may be detected. Although angiography is not usually required for the diagnosis of PDA, it may be needed during per cutaneous interventions or before surgery also to evaluate any associated lesions.
| Case Report|| |
A 31-year-old man with a history of surgical ligation of the PDA 20 years earlier was referred to our adult congenital heart disease clinic for the percutaneous closure of his residual PDA. Aside from a history of chronic atypical chest pain and some episodes of dyspnea on exertion, the patient had a history of endarteritis shortly after the surgical PDA closure 20 years ago, resulting in 6-week hospital stay and intravenous antibiotic therapy. Then, he was followed up for a small residual PDA of no clinical significance. On referral to us, physical examination was unremarkable except for a bounding pulse and a loud continuous machinery murmur at the upper left sternal border. Electrocardiography revealed a normal sinus rhythm and an LV volume-overload pattern. Laboratory data, including the sedimentation rate and inflammatory markers, illustrated no abnormal findings. Transthoracic echocardiography demonstrated severe LV enlargement with an ejection fraction of 40%, together with a top-normal right ventricular size and mild right ventricular dysfunction.
Two-dimensional and color-flow imaging in the parasternal short-axis and suprasternal views showed a moderately large residual PDA with a continuous turbulent flow between the proximal PDA and the descending aorta. Transesophageal echocardiography was performed to better evaluate the size and shape of the residual PDA: the aortic and pulmonary artery sides were 11 mm and 9 mm, respectively [Figure 1], [Figure 2] and Videos 1, 2]. Furthermore, there was a large echo-free space adjacent to the proximal PDA. Although at echocardiography a calcified aneurysm of PDA was suspected, it was not very well defined. CT angiography of the thoracic aorta with an intravenous contrast agent revealed aneurysmal dilatation of the PDA with wall calcification [Figure 3]; in addition, the total aneurysm length was 31 mm and the internal lumen diameter was 12 mm.
|Figure 1: Left panel: Color flow imaging of patent ductus arteriosus in parasternal short-axis view (white arrow). Middle panel: Continuous-wave Doppler study of patent ductus arteriosus. Right panel: Color flow imaging of patent ductus arteriosus at transesophageal echocardiography. Ao: Aorta|
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|Figure 2: Three-dimensional transesophageal echocardiography image of patent ductus arteriosus en face view (white arrow)|
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|Figure 3: Cardiac computed tomography angiography, Left panel: Sagittal view showing calcified aneurysm of patent ductus arteriosus Right panel: Three-dimensional volume rendering of patent ductus arteriosus|
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Left and right heart catheterization showed a calcified aneurysm of PDA adjacent to the left pulmonary artery and a pulmonary artery pressure of 40/20 mmHg [Videos 3 and 4].
In light of the above-mentioned findings and suspicion of a true calcified aneurysm of PDA as opposed to a PDA pseudoaneurysm, our heart team opted for the surgical approach. The patient underwent mid-sternotomy open-heart surgery [Figure 4], whereby the calcified aneurysm of ductus was excised successfully.
|Figure 4: Surgical view of calcified aneurysm of patent ductus arteriosus (black arrow)|
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Intraoperative transesophageal echocardiography confirmed no residual PDA, and the patient was discharged home a few days later without any surgical complications.
| Discussion|| |
Herein, we presented a rare case of the late diagnosis of a residual calcified aneurysm of PDA after its surgical ligation with a history of endarteritis following surgery. In our patient, echocardiography demonstrated the residual PDA with a significant left-to-right shunt; nonetheless, finding a calcified aneurysm of PDA requires sufficient knowledge about postoperative complications and careful evaluations via echocardiography and cardiac CT. Angiography is a useful method for hemodynamic assessment and possible percutaneous closure of the residual aneurysm of PDA. As our patient was not suitable for percutaneous closure and we could not distinguish between a calcified aneurysm of PDA and the pseudoaneurysm formation of the PDA, we candidated him for open-heart surgery.
Nowadays, most PDAs are amenable to percutaneous device closure and transcatheter occlusion has become the treatment of choice for most of these congenital malformations., On the rare occasion of the presence of a very large ductus, the surgical division of the PDA remains the preferred modality. Nevertheless, our patient had already undergone ligation alone rather than total excision, which is inherently associated with more recanalization and aneurysm formation. Rarely, a large window-type PDA may have insufficient length to permit ligation, and the suitable surgical procedure is patch closure with cardiopulmonary bypass. The complete closure rate of surgical ligation (most often accompanied by the division of the ductus) ranges from 94% to 100%. Important surgical complications include bleeding, pneumothorax, and infection.
Another salient point with respect to our patient was the occurrence of endarteritis shortly after the surgical closure of the PDA. The complication was cured with medical therapy alone, but the residual flow in a surgically manipulated ductus – especially when it is associated with an episode of endarteritis – should never be deemed negligible. In other words, our patient had been initially grossly mismanaged. The question, therefore, is what course of action should be taken in this scenario. Obviously, surgical treatment is the first choice, but the intraoperative complication feared the most is injury secondary to bleeding from the aortic or pulmonary stump owing to the presence of heavy calcification.,
A PDA aneurysm is a rare lesion with a spontaneous or acquired origin and with an incidence rate of 8%. Ductal aneurysms may develop in the wake of infective endarteritis, surgical closure (as was the case in our patient), or transcatheter coil occlusion.
In 25% of patients, an underlying disorder such as trisomy 21, trisomy 13, Smith–Lemli–Opitz syndrome, type IV Ehlers–Danlos syndrome, or Marfan syndrome is present (which was not the case in our patient). In our patient, surgical intervention successfully resolved this scenario and he was discharged home without any residual ductus flow.
| Conclusions|| |
We showed that even a longstanding neglected large calcified PDA aneurysm after surgical ligation in conjunction with an episode of endarteritis may be successfully treated surgically in experienced hands without any residue or complications, provided that in addition to full echocardiographic study, comprehensive multimodality imaging of the detailed anatomy and relationship with various adjacent vascular and extravascular structures delineated in properly selected cases, with CT angiography and/or catheterization.
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
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]