Electrocardiogram readings in different degrees of secondary atrial septal defect

Abdyzhaparova, E K; Dzhishambaev, E D; Usupbaeva, D. A.

doi:10.17116/terarkh201688416-19

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“…The defect range is too large and shows obvious signs of right ventricular hypertrophy. There was a significant positive correlation between defect range with the amplitude and duration of P wave, R wave amplitude in lead V1 and the S wave amplitude in lead V5 (10). Movement of the AS and VS are in real-time induced by the heartbeat, while there is obvious deviation between dose-volume parameters and the delivery dose since conventional statical simulated 3D-CT images exclude the motion information.…”

Section: Introductionmentioning

confidence: 96%

The margin of internal risk volume on atrial septal and ventricular septal based on electrocardiograph gating 4DCT

Li¹,

Tong²,

Gong³

et al. 2021

Ann Transl Med

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Background: The aim of this study was to quantify the margin of internal risk volume (IRV) on the atrial septum (AS) and ventricular septum (VS) based on electrocardiograph gating (ECG-gating) 4DCT.Methods: Twenty patients were enrolled and received an ECG-gating 4DCT scan performed in breathhold, and CT images were reconstructed at 5% intervals of the cardiac cycle for a total of 20 phases (0-95%).The contouring of the AS and VS were delineated in each phase, and the displacements and margin of the AS and VS were calculated. We fused the total of the AS and VS (0-95% phase), which were recorded as AS 20 and VS 20 . The margins were applied to the AS and VS in every phase and revised according to the cover rate of AS 20 and VS 20 .Results: (I) The margins of the AS and VS according to displacements in the left-right, cranio-caudal, and antero-posterior direction were 3 mm, 3 mm, and 3 mm; and 3 mm, 3 mm, and 2 mm, respectively. (II) The volume of AS 20 was (11.80±3.72) cm 3 , which was 2.9 times larger than the maximum volume of the AS. The volume of VS 20 was (60.45±12.92) cm 3 , which was 1.6 times larger than the maximum volume of the VS. (III)The emendatory margins of the AS and VS in the left-right, cranio-caudal, and antero-posterior direction were 7 mm, 10 mm, and 7 mm; and 5 mm, 3 mm, and 4 mm, respectively. The emendatory margins were added to the AS and VS, and the coverage rates were (95.88±3.29)% and (95.24±2.54)%, respectively. Conclusions:The margin of IRV on the AS and VS could cover the movement of AS and VS induced by heartbeat in the left-right, cranio-caudal, and antero-posterior direction respectively during thoracic radiotherapy.

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Section: Introductionmentioning

confidence: 96%

The margin of internal risk volume on atrial septal and ventricular septal based on electrocardiograph gating 4DCT

Li¹,

Tong²,

Gong³

et al. 2021

Ann Transl Med

View full text Add to dashboard Cite

show abstract

Electrocardiogram readings in different degrees of secondary atrial septal defect

Abstract: The degree of electrocardiographic changes in secondary ASD depends on its size. Giant defects are characterized by a frequent EHA deviation to the right, pronounced signs of right ventricular hypertrophy, and a higher prevalence of right bundle branch block.

Cited by 1 publication

References 1 publication

The margin of internal risk volume on atrial septal and ventricular septal based on electrocardiograph gating 4DCT

The margin of internal risk volume on atrial septal and ventricular septal based on electrocardiograph gating 4DCT

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