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BRANCH. This is a metaphorical expression, which designates, in the genealogy of a numerous family, a portion of that family which has sprang from the same root or stock; these latter expressions, like the first, are also metaphorical.
     2. The whole of a genealogy is often called the genealogical tree; and sometimes it is made to take the form of a tree, which is in the first place divided into as many branches as there are children, afterwards into as many branches as there are grand-children, then of great grandchildren, &c. If, for example, it be desired to have a genealogical tree of Peter's family, Peter will be made the trunk of the tree; if he has had two children, John and James, their names will be written on the first two branches; which will themselves shoot out as many smaller branches as John and James have children; from these other's proceed, till the whole family is represented on the tree; thus the origin, the application, and the use of the word branch in genealogy will be at once perceived.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Objective: To determine the role of visual quantification of Tc-99m MIBI myocardial perfusion SPECT in left bundle branch block as compared to coronary angiography findings.
Left bundle branch block (LBBB) is an abnormality of cardiac conduction system which causes delayed activation of left ventricle leading to delayed left ventricular contraction compared to the right ventricle.1 LBBB in children is associated with cardiovascular disease or surgery and is not observed in the general population.
A total of sixty patients of acute myocardial infarction were enrolled for study, out of which 30 patients presented as acute myocardial infarction with bundle branch block and 30 patients presented as acute myocardial infarction without bundle branch block.
A repeated 12-lead electrocardiogram revealed sinus tachycardia with incomplete right bundle branch block.
Echocardiography (ECG) shows different changes in the form of sinus tachycardia, bundle branch blocks, intraventricular conduction defect, atrial and ventricular premature complexes, atrial fibrillation, ventricular tachyarrhythmia, ST segment elevation or depression, and T wave inversion.
(9) Sudden increases in right-sided pressure can lead to transient right bundle branch block, which may result in complete heart block in the setting of baseline left bundle branch block.
A narrow complex tachycardia or supraventricular tachycardia usually has a QRS duration of <120 ms, unless there is bundle branch block or an intraventricular conduction abnormality.
Verapamil also reduced the frequency of chest blow induced bundle branch block (BBB), 0 of 7 verapamil strikes compared to 9 of 16 (56%) placebo strikes (p = 0.03).