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William Birnbaum with a Phonocardiogram System for use in Project Gemini, 1965. Awareness of the sounds made by the heart dates to ancient times. The idea of developing an instrument to record it may date back to Robert Hooke (1635–1703), who wrote: "There may also be a possibility of discovering the internal motions and actions of bodies - whether animal, vegetable, or mineral, by the sound ...
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Murmurs have seven main characteristics. These include timing, shape, location, radiation, intensity, pitch and quality. [7]Timing refers to whether the murmur is a systolic, diastolic, or continuous murmur.
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If you were to ask a Magic 8 ball, the answer might be, "signs point to yes." It isn't certain that winter causes erectile dysfunction, but many things about the season are linked to increased ED.
S 3 is thought to be caused by the undulation of blood back and forth between the walls of the ventricles initiated by the inflow of blood from the atria. The reason the third heart sound does not occur until the middle third of diastole is probably that, during the early part of diastole, the ventricles are not filled sufficiently to create enough tension for reverberation.
Myocardial perfusion imaging or scanning (also referred to as MPI or MPS) is a nuclear medicine procedure that illustrates the function of the heart muscle (). [1]It evaluates many heart conditions, such as coronary artery disease (CAD), [2] hypertrophic cardiomyopathy and heart wall motion abnormalities.
Last September, as Islamic State militants rampaged through Syria and Iraq, the Pentagon hosted a top-secret meeting to debate strategy. At the invitation of the Defense Policy Board, which advises the secretary of defense, a small group of foreign policy eminences, including former National Security Advisor Zbigniew Brzezinski, former Secretary of State Madeleine Albright and former ...