Pianzola E L, Fernández F D, Ricci L
Arch Inst Cardiol Mex. 1986 Nov-Dec;56(6):507-13.
Seven hundred patients, 337 male (48.2%), 363 female (51.8%) requiring Holter Electrocardiogram were studied. The predominant age group ranged from 50 to 59. Symptoms were more frequent in women. Lown's classification was used to determine the frequency of arrhythmias; 47% were supraventricular arrhythmias and 56% were of ventricular origin. Most of the latter (30.9%) were included in Group I of the classification. The remaining cases appeared in a decreasing distribution in the other groups. This suggests that in our population, severe arrhythmias are infrequent. With the hypothesis that distribution of symptoms is independent from arrhythmia onset, a multiple contingency table was designed. The X2 value was 82 with freedom of 316 degrees. It confirms that 1) severe arrhythmias (ventricular tachycardia, frequent ventricular premature beats or couplets) may go unnoticed, and on the other hand 2) Symptoms are not related with occurrence or severity of arrhythmias.
对700例需要进行动态心电图检查的患者进行了研究，其中男性337例（48.2%），女性363例（51.8%）。主要年龄组为50至59岁。女性症状更为常见。采用洛恩分类法确定心律失常的发生率；47%为室上性心律失常，56%为室性起源。后者大多数（30.9%）属于分类中的I组。其余病例在其他组中的分布呈递减趋势。这表明在我们的研究人群中，严重心律失常并不常见。基于症状分布与心律失常发作无关的假设，设计了一个多重列联表。X2值为82，自由度为316。这证实了1）严重心律失常（室性心动过速、频发室性早搏或成对早搏）可能未被察觉，另一方面2）症状与心律失常的发生或严重程度无关。
