Gavin McCullough

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North American glyptodonts originated from South American ancestors during the Great American Biotic Interchange no later than early Blancan North American Land Mammal Age (NALMA). A substantial expansion in population samples from the late Blancan 111 Ranch fauna of southeastern Arizona, several late Blancan faunas in New Mexico, and the early(More)
At 2 weeks of age, a male infant was diagnosed with severe pulmonary valve stenosis (62 mm Hg peak systolic gradient). The pulmonary valve was domed and thickened with a very small opening orifice (Fig. 1a). At 9 weeks of age, balloon dilation (BD) was performed with a Tyshak (NuMED, Inc., Hopkinton, NY, USA) BD (10 mm 9 2 cm) catheter, decreasing(More)
Of the more than 200 patients recently evaluated for venous disease, 8 were diagnosed with lower extremity masses. Three patients were referred for superficial phlebitis and four for deep venous obstructive disease. The eighth mass was found during work-up for varicose veins. Five masses were identified by palpation, and three were identified by duplex(More)
We studied the clinical utility of echocardiography in children and applied principles of business management to draw conclusions that are applicable to health care in general. A significant number (13% in this series) of expensive medical diagnostic tests could be avoided without harm to patients. Cost reduction in medicine is possible in many situations(More)
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