Colour-Doppler echocardiography flow field velocity reconstruction using a streamfunction–vorticity formulation

We introduce a new method ( Do ppler Ve locity R econstruction or DoVeR), for reconstructing two-component velocity fields from colour Doppler scans. DoVeR employs the streamfunction–vorticity equation, which satisfies mass conservation while accurately approximating the flow rate of rotation. We validated DoVeR using artificial colour Doppler images generated from computational fluid dynamics models of left ventricle (LV) flow. We compare DoVeR against the conventional intraventricular vector flow mapping (iVFM 1D ) and reformulated iVFM (iVFM 2D ). LV model error analysis showed that DoVeR is more robust to noise and probe placement, with noise RMS errors ( nRMSE ) between 3.81% and 6.67%, while the iVFM methods delivered 4.16–24.17% for iVFM 1D and 4.06–400.21% for iVFM 2D . We test the DoVeR and iVFM methods using in vivo mouse LV ultrasound scans. DoVeR yielded more haemodynamically accurate reconstructions, suggesting that it can provide a more reliable approach for robust quantification of cardiac flow.

A rare case of double orifice mitral valve with flail leaflet with embryological significance – A case report

Mitral valve having a double orifice opening into the left ventricle is an uncommon anomaly, In this case study we describe about a 25 years old female who came to cardiology outpatient block with exertional dysnea , the abnormality was suspected by a murmur ,further investigation Colour Doppler echocardiography showed congenital double-orifice mitral valve. This finding was confirmed by open heart surgery, and her mitral valve was successfully repaired. DOI: http://dx.doi.org/10.3329/bjms.v13i1.17442 Bangladesh Journal of Medical Science Vol. 13 No. 01 January2014: 80-83

The importance of echocardiography in diagnostics of idiopathic pulmonary arterial hypertension: A case report

Introduction. Idiopathic pulmonary arterial hypertension (IPAH) is rare and difficult progressive disease with prevalence of approximately 15 cases per million residents, with predominant female cases. Case Outline. A 47-year-old female presented with symptoms and signs of the right heart chambers failure. Over prior seven years the patient had the feeling of suffocation and fatigue when walking, and received treatment for bronchial asthma. Physical examination revealed a marked loud second heart sound over the pulmonary artery. Electrocardiogram: right ventricular hypertrophy. Spirometric (pulmonary capacity) test, cardiac perfusion scan and spiral CT scanning excluded secondary pulmonary arterial hypertension. Blood testing for connective tissue diseases and HIV were within normal reference limits. Transthoracic colour Doppler echocardiography demonstrated a mild tricuspid regurgitation with high values of estimated maximal and middle systolic pressure of the right ventricle (135/110 mm Hg), and excluded previous heart disease. Cardiac catheterization confirmed IPAH diagnosis, with systolic right ventricular pressure of 101/47/66 mm Hg and pulmonary capillary pressure of 30/13/10 mm Hg. Basic therapy with sildenafil, nevertheless, considerable limitations of strain tolerance was still present. Conclusion. IPAH is a severe heart disease with non-specific signs and symptoms. Screening for IPAH is transthoracic colour Doppler echocardiography shows high correlation with cardiac catheterization.