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Updated: Jul 22, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
Published on: April 5, 2011
Electrocardiographic low-frequency QRS notching and ventilatory impairment in patients with pulmonary tuberculosis
Abstract:
The occurrence of notching in the initial and terminal parts of the QRS complex of the ECG was studied in a series of 1072 patients with active or healed pulmonary tuberculosis. Terminal notchings were associated with ventilatory impairment: in the male group the percentage of patients with terminal notching increased from 5 to 20% as the FEV1.0% decreased from larger than or equal to 80 to below 40. Initial notchings were not associated with ventilatory impairment. The relationships were similar when studied separately in groups with and without left heart disease.
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The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
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