Lorenzo J G, Terol I, Plaza L
Arch Inst Cardiol Mex. 1985 Jul-Aug;55(4):337-41.
We have studied a total of 12,009 school children (age range 6 to 14 years) in order to determine the incidence of thoracic innocent murmurs. 6,816 were male and 5,193 female. A initial clinical evaluation was carried out in the school and the second examination was performed in our hospital. Global incidence of innocent murmurs was 9.57% with a female/male ratio of 1.73. We divided the innocent murmurs according with Fishleder's method: mesocardial systolic murmur (62%), pulmonary systolic murmur (26%), protosystolic apical murmur (7%), "whooping" murmur (5%). Afterwards, children with murmurs were divided in two groups of age and anthropometric characteristics observing a significative increment in the incidence of mesocardial systolic murmur in children which ranged ages from 6 to 10 years (74%) and of the pulmonary systolic murmur in the group of 10 to 14 years (40%).
为了确定胸部无害性杂音的发生率，我们总共研究了12009名学童（年龄范围6至14岁）。其中6816名是男性，5193名是女性。首先在学校进行了初步临床评估，第二次检查在我们医院进行。无害性杂音的总体发生率为9.57%，女性与男性的比例为1.73。我们根据菲什莱德方法对无害性杂音进行分类：心肌收缩期杂音（62%）、肺动脉收缩期杂音（26%）、收缩期前心尖部杂音（7%）、“哮吼样”杂音（5%）。之后，根据年龄和人体测量特征将有杂音的儿童分为两组，结果观察到6至10岁儿童中心肌收缩期杂音的发生率显著增加（74%），而在10至14岁组中肺动脉收缩期杂音的发生率显著增加（40%）。
