Spontaneous subarachnoid hemorrhage (SAH) as the presenting feature of infective endocarditis (IE) is rare. It has classically been described in association with the rupture of intracranial mycotic aneurysms (ICMA). Here we describe a very rare case of non-aneurysmal spontaneous SAH in a patient with IE. The patient originally presented with a headache and low-grade fever. Neuroimaging includin...

1. INTRODUCTION. A cycloid is the path traced by a point on the boundary of a circular disk that rolls without slipping along a straight line. It forms a sequence of arches resting on the line, as shown in Figure 1. It is known that the area of the shaded region below one arch is three times the area of the rolling disk. Our analysis shows that the factor 3 reflects a much deeper property of cy...

Infective endocarditis (IE) is a notorious complication of intravenous drug use (IDU). It typically affects the cardiac valves. Among these, the tricuspid is the most common affected valve, although the mitral and/or aortic valves can also be involved. Methicillin sensitive staphylococcus aureus (MSSA) is the most common etiological microbial agent of IE in IDU. Once IE is diagnosed, antibiotic...