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Case Reports
. 2024 Jun 21;10(9):656-660.
doi: 10.1016/j.hrcr.2024.06.013. eCollection 2024 Sep.

Unipolar morphology-guided critical isthmus emphasis in a patient with scar-related ventricular tachycardia

Naoya Kataoka  1 , Teruhiko Imamura  1 , Keisuke Uchida  1 , Takahisa Koi  1 , Koichiro Kinugawa  1
Affiliations
Case Reports

Unipolar morphology-guided critical isthmus emphasis in a patient with scar-related ventricular tachycardia

Naoya Kataoka et al. HeartRhythm Case Rep. .
No abstract available

Keywords: Activation-recovery interval; High-pass filter; Reentry arrhythmias; Unipolar potential; Ventricular tachycardia.

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Conflict of interest statement

There were no relationships with industry.

Figures

Figure 1
Figure 1
The targeted ventricular tachycardia (VT) and the endocardial mapping. A: The left panel shows the electrocardiogram during sinus rhythm; the right panel, VT. B: Activation map of the targeted VT. The white circled area indicates the location where the diastolic potentials were recorded during the tachycardia. C: Bipolar voltage map during sinus rhythm, with a cut-off for low voltage set at <1.5 mV. D: Unipolar voltage map during sinus rhythm, with a cut-off for low voltage set at <8.3 mV. E: Isochronal late activation map for revealing the deceleration zone, which is depicted by the pink circles. The yellow lines indicate localized functional lines of block detected by the isochronal activation map.
Figure 2
Figure 2
Unipolar activation maps with 2 high-pass filter settings. Figures where the duration from the onset to the maximum dV/dt point of the unipolar waveform was color-coded with reference to the S wave of lead I in surface electrocardiogram. The number of milliseconds indicates the blanking time from the S wave of lead I.
Figure 3
Figure 3
Unipolar potential morphologies. Maps identifying from the S wave in lead I to the maximum dV/dt point using the local unipolar morphologies. (1) and (2) indicate the critical isthmus point and another area, respectively, which are the same points irrespective of the filter setting. A: High-pass filter set at 0.05 Hz. B: High-pass filter set at 2 Hz.
See this image and copyright information in PMC

References

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