failure of the left ventricle causes increased pressure in the lung's blood vessels.
failure of the left ventricle causes increased pressure in the lung's blood vessels.
where does failure of the left ventricle cause increased pressure?
lung's blood vessels
during ventricular contraction, or systole, some of the blood from the left ventricle leaks into the right ventricle, passes through the lungs and reenters the left ventricle via the pulmonary veins and left atrium. this has two net effects. first, the circuitous refluxing of blood causes volume overload on the left ventricle. second, because the left ventricle normally has a much higher systolic pressure (~120 mmhg) than the right ventricle (~20 mmhg), the leakage of blood into the right ventricle therefore elevates right ventricular pressure and volume, causing pulmonary hypertension with its associated symptoms.
ventricular septal defect
tamponade can often be diagnosed radiographically. echocardiography, which is the diagnostic test of choice, often demonstrates an enlarged pericardium or collapsed ventricles. a large cardiac tamponade will show as an enlarged globular-shaped heart on chest x-ray. during inspiration, the negative pressure in the thoracic cavity will cause increased pressure into the right ventricle. this increased pressure in the right ventricle will cause the interventricular septum to bulge towards the left ventricle, leading to decreased filling of the left ventricle. at the same time, right ventricle volume is markedly diminished and sometimes it can collapse.









































section::::treatment.









































section::::treatment.:pre-hospital care.
cardiac tamponade