A 63-yr-old patient presented with a preoperative diagnosis of aortic stenosis and pulmonary stenosis for aortic valve (AV) replacement and possible pulmonary valve (PV) repair. His symptoms included chest heaviness and shortness of breath. A preoperative transthoracic echocardiogram demonstrated calcified tri-leaflet AV with severe stenosis and a peak pulmonic flow velocity of 3.7 m/s. Cardiac...

ngiographic and echocardiographic studies A have demonstrated that subjects with hypertrophic subaortic stenosis display an abnormal systolic outflow tract narrowing brought about by apposition of a paradoxically moving anterior rnitral leaflet and a hypertrophic interventricular septum.' The hemodynamic consequence of such obstruction is the development of a fluctuant gradient between thc infl...

A 64-year-old man with a large cavitating squamous cell carcinoma (636 cm) in the right lower lobe of the lung was referred for prelobectomy cardiac assessment because of incidental finding of Q waves in leads II, III, and aVF on the ECG. Physical examination revealed an ejection systolic murmur at the left sternal edge. Cardiac size was normal on chest radiograph. A transthoracic echocardiogra...

We consider traffic dynamics for a network of signalized intersections under fixed time control, where the outflow from every link is constrained to be equal to an autonomous capacity function (and hence fixed-time control) if the queue length is positive and equal to the cumulative inflow otherwise. In spite of the resulting dynamics being nonLipschitz, recent work has shown existence and uniq...