Jeyaraja, KRajeev, TThirunavukkarasu, PSGowri, BTANUVAS2021-03-052021-03-052015-01https://krishikosh.egranth.ac.in/handle/1/5810161953TNV_33_ISVM_22-24Jan_(2015)5Elevation of pulmonary arterial pressure above normal constitutes pulmonary hypertension. More specifically, pulmonary hypertension can be defined as pulmonary arterial systolic pressure > 30 mmHg, pulmonary arterial diastolic pressure > l5 rmnHg, or pulmonary arterial mean pressure > 20 mmHg. Although it is possible to obtain these measurements directly through right-sided cardiac catheterization, this procedure typically requires heavy sedation or anaesthesia, is considered high risk in unstable patients, and can be costly. Alternatively, pulmonary arterial pressures can be assessed by transthoracic- echocardiography, which includes subjective assessment of cardiac changes and Doppler analysis of tricuspid valve regurgitation and pulmonary valve insufficiency. Chronic degenerative mitral valve disease (CDMD) can lead to left heart dilatation and increased left atrial pressure causing elevated pulmonary venous pressure, pulmonary oedema and chronic post capillary hypoxia and post capillary pulmonary hypertension.EnglishVeterinary ScienceOther