Two-stage endovascular treatment of a patient with hemodynamic interrupted aortic arch in segment A and bicuspid aortic valve

Corresponding Author:

Kostiantyn Boyko
Heart Institute,
Ministry of Health,
Kyiv,
Ukraine,
E-mail: dmitriy.loskutov96@gmail.com

Received date: January 11, 2021 Accepted date: February 03, 2021 Published date: February 10, 2021

Abstract

This clinical case represents an experience of two-stage endovascular repair of Complete Interrupted Aortic Arch (CIAA) in segment A in a 21-year-old patient.

Upon admission to clinic, the patient was diagnosed with CIAA and bicuspid aortic valve. Aortography showed CIAA distally from the origin of the left subclavian artery. At the first stage of treatment, CIAA on-site perforation was performed followed by PTFE (polytetrafluoroethylene)-coated CP STENT 45 mm system implantation using BIB (Balloon-in-Balloon) catheter.

The second intervention stage was performed 10 months after the first stage using balloon dilatation of stented segment with AndraBalloon 12.0 mm × 20.0 mm and 14.0 × 40.0 mm.

The residual maximum pressure gradient in descending aorta after our treatment was 10 mm Hg.

Three years after the treatment the patient has no symptoms of CIAA or coarctation, the patient does not take any antihypertensive drugs, and the pressure on the upper limbs is 125/85 mm Hg.

Keywords

Interrupted aortic arch • Bicuspid aortic valve • Refractory hypertension • Aortic coarctation

Introduction

Complete Interrupted Aortic Arch (CIAA) is a rare congenital abnormality defined as a complete loss of anatomical continuity between the ascending and descending parts of aorta. Up to 98% of similar cases are associated with additional cardiovascular anatomical defects [1]. Overall, this abnormality accounts for approximately 1% of critical congenital heart diseases [2]. Only few IAA cases in adults have been described in the scientific literature [3]. The authors describe a rare case of two-stage endovascular treatment in 21-year-old patient with IAA in segment A and bicuspid aortic valve with good clinical outcome.

Materials and Methods

Patient history

Patient 21 years old with a history of refractory hypertension from early childhood, underwent regular medical examination. At the time of physical examination, the patient complained of recurrent pain and leg weakness. A systolic murmur was heard during the auscultation of the heart in aortic valve projection. Blood pressure on the upper limbs was 140/90 mm Hg, lower limbs-90/60 mm Hg.

Patient was hospitalized. Laboratory studies showed no significant changes, including biomarkers of myocardial necrosis. 12-lead electrocardiogram showed early ventricular repolarization syndrome. Dopplerographic examination of renal vessels showed no findings for stenotic process in the main artery trunks and vasorenal hypertension. In addition, no pathology detected during ultrasonic examination of the abdominal cavity and thyroid gland. The patient had no signs of cardiofacial syndrome. The presence of refractory hypertension, a large difference in pressure on the upper and lower limbs, as well as the lack of data for pathology in other organs and systems suggested possible aortic coarctation.

Echocardiography showed aortic coarctation with Δp in descending aorta of 35 mm Hg, bicuspid aortic valve with aortic insufficiency of 1 degree.

Chest CT scan showed signs of abnormal thoracic aorta development: local hypoplasia site in the aortic arch with a critical lumen diameter (presumably with interruption of the lumen).

The patient underwent aortography to confirm diagnosis. Aortographic findings showed hemodynamic CIAA in segment A with Δp 50 mm Hg.

Operative technique

Following surgical case conference it was decided to conduct a two-stage endovascular intervention with recanalization and stenting CIAA using a CP STENT 45 mm PTFE-coated stent system (Figure 1).

Endovascular treatment was performed in the presence of a surgical team for emergency thoracotomy using prepared heartlung apparatus.

The second intervention stage was performed 10 months after the first stage using balloon dilatation of stented segment with AndraBalloon 12.0 mm × 20.0 mm and 14.0 × 40.0 mm (Figure 2).

The residual maximum pressure gradient in descending aorta after our treatment was 10 mm Hg.

Three years after the treatment the patient has no symptoms of CIAA or coarctation, the patient does not take any antihypertensive drugs, and the pressure on the upper limbs is 125/85 mm Hg.

Discussion

We presented a rare case of a 21-year-old patient with CIAA in segment A in combination with a bicuspid aortic valve, who underwent elective endovascular treatment of this disease.

This abnormality was first classified by Celoria and Patton in 1959 [4]. Based on this classification, CIAA is divided into three different types depending on the location of interrupted aorta: type A is distal to the origin of the Left Subclavian Artery (LSA), type B is located between the Left Common Carotid Artery (LCCA) and LSA, and type C–between innominate artery and LCCA [5]. According to Patel et al. studies, type B CIAA is most common in newborns (53%) and associates with cardiofacial syndrome and deletion of chromosome 22q11.2 [5]. According to Gordon et al., type A is more common in adults (79%) [3].

As shown by Silva et al, the survival rate of such patients and degree of disability depend on the development of collaterals. Moreover, the presence of arterial duct, which gradually closes in childhood, is crucial for the development of this collateral network [6].

There are various surgical options for correction depending on the anatomy and interruption site. The main purpose of CIAA surgery is to recover aorta patency and correct concomitant cardiovascular abnormalities, preferably in a one-stage procedure [9]. One-stage CIAA recovery was described for the first time by Barratt-Boyes [7]. The procedure described by author in 1972 provided for arc continuity repair using a synthetic prosthesis. Trusler described one-stage repair involving straight arch anastomosis for the first time in 1975 [8].

According to Krishna et al. studies, extra-anatomical shunting is the preferred method due to complexity of surgical correction associated with the risk of massive blood loss due to developed collateral vessels network [10]. According to Hudsmith et al., only 8% of patients undergo percutaneous perforation with a guidewire through stenotic region of CIAA followed by placement of a drug-eluting stent. This procedure can be performed where the data available on aorta integrity on both sides of CIAA [11]. In addition, prior this type of intervention, it is necessary to notify the surgical team of possible complications.

Conclusion

We presented a clinical case of endovascular treatment of an adult patient with a combined CIAA and bicuspid aortic valve. Although CIAA may be fatal in early childhood, patients without shunting lesions can live up to adulthood with adequate development of collateral blood supply. The location of occlusion, thoracic aorta morphology, concomitant cardiovascular abnormalities, and patient’s condition play a key role in deciding on treatment tactics in such patients.

Declaration of Conflicting Interests

The authors declare no conflicts of interest and do not have any financial disclosures.

Funding

The author(s) received no financial support for the research, author- ship, and/or publication of this article.

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