RT Journal Article SR Electronic T1 Formula and nomogram for the sphygmomanometric calculation of the mean arterial pressure JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 64 OP 64 DO 10.1136/heart.84.1.64 VO 84 IS 1 A1 EDUARDO MEANEY A1 FELIX ALVA A1 RAFAEL MOGUEL A1 ALEJANDRA MEANEY A1 JUAN ALVA A1 RICHARD WEBEL YR 2000 UL http://heart.bmj.com/content/84/1/64.abstract AB