Chronic thromboembolic pulmonary hypertension. Epidemiology and Pathophysiology. P resent late in the course of the disease. E arly natural history of the condition is not completely known. C an occur without symptoms . M ay remain asymptomatic for months or years.
The existence of a “honeymoon period” during which time pulmonaryhypertension is present but the subject exhibits few symptoms, if any. It is during thistime that compensatory hypertrophy of the right ventricle occurs in an effort to maintaincardiac output in the presence of increased pulmonary vascular resistance (PVR).
The pathophysiologicalevents in the progression of pulmonary hypertensionduring this period have not been well defined.
are good candidates for PTE
Surgical success depends on having a bloodless field socardiopulmonary bypass with periods of circulatory arrest is essential to preventbronchial arterial flow flooding the surgical field.
hemorrhages < 5%
neurologicals < 3%
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