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Any negative wave occurring after a positive wave is an S-wave. Large waves are referred to by their capital letters (Q, R, S), and small waves are referred to by their lower-case letters (q, r, s). Figure 5 shows examples of naming of the QRS-complex. Figure 5. Naming of the QRS complex. Net direction of the QRS complex.
8 Οκτ 2024 · The type A pattern is associated with a left-sided accessory pathway and manifests a dominant R wave in V1 that may mimic right ventricular hypertrophy. Our patient above has a type B pattern – a dominant S wave in V1 indicates a right-sided accessory pathway.
19 Μαΐ 2024 · R wave: it is the first positive wave in the QRS complex. It can be preceded by a negative wave. If another positive wave were present in the QRS complex, it is referred to as R’ wave. S wave: it is the second negative wave in the QRS complex, appearing after the R wave.
ECG Basics including Rate, Rhythm, Axis calculations and interpretation of P, Q, R, S, T U waves, segments and basic ECG calculations.
S Wave. The S wave is the first downward deflection of the QRS complex that occurs after the R wave. However, a S wave may not be present in all ECG leads in a given patient. In the...
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5 Μαρ 2011 · The ST segment starts at the end of the S wave and ends at the beginning of the T wave. The ST segment is an isoelectric line representing the time between depolarisation and repolarisation of the ventricles (i.e. ventricular contraction).
