Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
권호 표지

Double-chambered Right Ventricle with Intact Ventricular Septum in a Maltese Dog

말티즈 견에서 발생한 우심실양분증

  • Accepted : 2014.09.29
  • Published : 2014.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

A 6-year-old female Maltese (body weight, 3.1 kg) without clinical signs was referred for further evaluation of the cause of cardiac murmur. Thoracic radiography revealed right-sided cardiomegaly. Echocardiography showed marked hypertrophic remodeling of the right ventricular free wall and an anomalous muscular bundle and fibrous nodule near the subinfundibular portion of the right ventricular outflow tract (RVOT), indicating a double-chambered right ventricle (DCRV). The turbulent flow from the anomalous muscular bundle to the main pulmonary artery was 4.6 m/sec, in addition to the tricuspid valvular regurgitation of 4.4 m/sec and main pulmonary artery flow of 1.1 m/sec. The dog is receiving atenolol (0.5 mg/kg) to minimize the deleterious cardiac effects of the high afterload, even though she remains asymptomatic. This report describes a case of DCRV, a rare congenital heart disease in dogs in South Korea.

임상증상이 없는 6년령의 3.1 kg 말티즈견이 심잡음의 원인에 대한 추가 검진을 위해서 내원하였다. 흉부 방사선에서는 우심비대가 확인되었다. 심장 초음파에서는 두드러진 우심실비대, 비정상적 근육 다발과 섬유성 결절이 우심실 유출로 아래 누두부에서 발견되었다. 이러한 소견은 우심실양분증의 전형적인 형태학적 소견이다. 비정상 근육다발에서 주폐동맥으로 향하는 와류의 속도는 4.6 m/sec, 삼첨판 역류는 4.4 m/sec, 주폐동맥 혈류는 1.1 m/sec로 각각 측정되었다. 본 환자는 비록 임상증상은 없지만 협착에 의한 과도한 후부하와 그로 인한 심장의 손상을 막기 위해서 현재 atenolol (0.5 mg/kg) 을 복용하고 있다. 본 증례는 한국에서 발생한 견종에서 매우 드문 우심실양분증에 대해서 기술하였습니다.

Keywords

References

  1. Alva C, Ortegon J, Herrera F. Types of obstructions in double-chambered right ventricle: mid-term results. Arch Med Res 2002; 33: 261-264. https://doi.org/10.1016/S0188-4409(02)00354-5
  2. Bright JM, Jennings J, Toal R. Percutaneous balloon valvuloplasty for treatment of pulmonic stenosis in a dog. J Am Vet Med Assoc 1987; 191: 995-996.
  3. Chandrashekhar YS, Anand IS, Wahi PL. Balloon dilatation of double-chamber right ventricle. Am Heart J 1990; 120: 1234-1236. https://doi.org/10.1016/0002-8703(90)90147-P
  4. Cil E, Saraclar M, Ozkutlu S. Double-chambered right ventricle: experience with 52 cases. Int J Cardiol 1995; 50: 19-29. https://doi.org/10.1016/0167-5273(95)02343-U
  5. Fukushima R, Tanaka R, Suzuki S. Epidemiological and morphological studies of double-chambered right ventricle in dogs. J Vet Med Sci 2011; 73: 1287-1293. https://doi.org/10.1292/jvms.10-0485
  6. Kittleson MD, Kienle RD. Small animal cardiovascular medicine. California: Mosby, 1998: 249-259.
  7. Koffas H, Fuentes VL, Boswood A, et al. Double chambered right ventricle in 9 cats. J Vet Intern Med 2007; 21: 76-80. https://doi.org/10.1111/j.1939-1676.2007.tb02931.x
  8. Koie H, Kurotobi EN, Sakai T. Double-chambered right ventricle in a dog. J Vet Med Sci 2000; 62: 651-653. https://doi.org/10.1292/jvms.62.651
  9. MacLean HN, Abbott JA, Pyle RL. Balloon dilation of double-chambered right ventricle in a cat. J Vet Intern Med 2002; 16: 478-484. https://doi.org/10.1111/j.1939-1676.2002.tb01268.x
  10. Martin JM, Orton EC, Boon JA. Surgical correction of double-chambered right ventricle in dogs. J Am Vet Med Assoc 2002; 220: 770-774. https://doi.org/10.2460/javma.2002.220.770
  11. Minors SL, O'Grady MR, Williams RM. Clinical and echocardiographic features of primary infundibular stenosis with intact ventricular septum in dogs. J Vet Intern Med 2006; 20: 1344-1350. https://doi.org/10.1111/j.1939-1676.2006.tb00749.x
  12. Oliveira P, Domenech O, Silva J. Retrospective review of congenital heart disease in 976 dogs. J Vet Intern Med 2011; 25: 477-483. https://doi.org/10.1111/j.1939-1676.2011.0711.x
  13. Rowland TW, Rosenthal A, Castaneda AR. Double-chamber right ventricle: experience with 17 cases. Am Heart J 1975; 89: 455-462. https://doi.org/10.1016/0002-8703(75)90151-9
  14. Willard MD, Eyster GE. Double-chambered right ventricle in two dogs. J Am Vet Med Assoc 1981; 178: 486-488.