Fragmented QRS (fQRS) is a convenient marker of myocardial scar evaluated by 12-lead electrocardiogram (ECG) recording. fQRS is defined as additional spikes within the QRS complex.

Fragmented wide QRS (f-wQRS) is defined as two or more notches in the R or S wave, in two contiguous leads corresponding to a coronary territory (anterior, lateral or inferior) (Fig. 1).

The goal of our study was to explore the prevalence and demographic characteristics of QRS end notching or slurring and of associated STj amplitude in an apparently healthy white population.

In case of complete/incomplete bundle branch block or pacemaker rhythm, >2 notches are required in the S-wave or R-wave. Fragmented QRS complexes are indications of previous myocardial infarction.

The hallmark of early repolarization is the end-QRS notch (a notch in the J point) or the end-QRS slur (the final slurring part of the R-wave). Refer to Figure 1.

Aug 14, 2023 · Fortunately, many causes of broad QRS can be identified by pattern recognition: Right bundle branch block produces an RSR’ pattern in V1 and deep slurred S waves in the lateral leads. Left bundle branch block produces a dominant S wave in V1 with broad, notched R waves and absent Q waves in the lateral leads. High Voltage QRS Morphology.

A detailed view of the QRS complex (Q-wave, R-wave and S-wave) with emphasis on normal findings, amplitudes, durations / intervals, pathology.

Oct 8, 2024 · There is absence of Q waves in leads V5-6. LBBB with AF. Note deep S waves in leads V1-3 and tall broad R waves laterally. Appropriate discordance is present. Incomplete LBBB is diagnosed when typical LBBB morphology is associated with a QRS duration <120ms.

In most studies fQRS has been defined by the presence of an additional R wave (R′), or notching in the nadir of the S wave, or the presence of >1 R′ in two contiguous leads corresponding to a major coronary territory.

Jul 14, 2008 · We postulate that fragmented wQRS (f-wQRS) due to bundle branch block, premature ventricular complexes, or paced rhythms (f-pQRS) signify myocardial scar and higher mortality.