base of the heart


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base of the heart

the portion of the heart opposite the apex. It is superior and medially located. It forms the upper border of the heart, lies just below the second rib, and primarily involves the left atrium, part of the right atrium, and the proximal portions of the great vessels.
References in periodicals archive ?
A Dacron wrap is pulled over the base of the heart, attached by sutures, and tightened so that it contains but does not strangle the heart, thus preventing further dilation and enhancing ventricular function.