Clinical electrocardiography . Fig. 89.—Aberrant Q R S complexes all derivations. ORS interval to Notching of apex Fig. 90.—Aberrant Q R S complexes all derivations. Q R S interval second. Derivation I, splintering descending limb. Derivation II,slurring of both limbs. Derivation III, notching of apex R. Aberrant Q RS Complexes in Isolated Derivations.—Abnor-malities of the Q R S complex in isolated derivations of the electro-cardiogram are quite frequently observed in routine clinical electro-cardiography. The aberrant complexes may be grouped intothose having
Clinical electrocardiography . Fig. 89.—Aberrant Q R S complexes all derivations. ORS interval to Notching of apex Fig. 90.—Aberrant Q R S complexes all derivations. Q R S interval second. Derivation I, splintering descending limb. Derivation II,slurring of both limbs. Derivation III, notching of apex R. Aberrant Q RS Complexes in Isolated Derivations.—Abnor-malities of the Q R S complex in isolated derivations of the electro-cardiogram are quite frequently observed in routine clinical electro-cardiography. The aberrant complexes may be grouped intothose having notching of the apex or limbs, and those in whichslurring or thickening of the apex or limbs occurs. These findingsobviously are less striking than the findings considered in theprevious discussion. DISORDERS OF CARDIAC CONDUCTION IO9 Notched QRS Complexes.—Wedd has called attention to therelationship, at times, of slight notching or localized thickeningof the R complex to myocarditis. I recently analyzed a series of electrocardiograms of 550 patients40having notching of the QRS complex in isolated derivations;77 (14 per c
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