Significance of PQ interval in acquisition of coronary multidetector row computed tomography

Journal of cardiology
Tomonari SanoJagat Narula

Abstract

Since image quality obtained in the mid-diastolic [or slow filling (SF)] phase is generally superior to end-systolic image in coronary multidetector row computed tomography (MDCT), low heart rate (HR) comprises the most important factor for acquisition of high-quality images. However, despite HR <70 and optimum breath-hold, sometimes high quality images cannot be obtained in SF. We assessed the significance of PQ interval in acquisition of coronary MDCT. Of 541 consecutive patients who underwent coronary MDCT, 7 patients with incomplete breath-hold, 62 HR ≥70, and 70 arrhythmias were excluded. The remaining 402 patients (M: 222, 66±11 years), including 38 with first-degree atrioventricular block (1° AVB, PQ >200 ms) were evaluated. RR and PQ were measured on electrocardiogram and systolic and SF phase with 4-chamber cine cardiac computed tomography. SF significantly (p<0.0001) correlated with RR (SF=-471+0.720RR, r=0.887) in all subjects. The SF of without 1° AVB (292±97 ms) was significantly (p<0.0147) longer than that of with 1° AVB (251±121 ms), although RR was not significantly different between the two groups. The SF/RR of without 1° AVB (27.2±6.1%) was also significantly (p<0.0001) higher than that of with 1° AVB (22.7±8....Continue Reading

References

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Citations

Dec 25, 2013·Nihon Hoshasen Gijutsu Gakkai zasshi·Tomonari Sano
Jun 15, 2011·Nihon Hoshasen Gijutsu Gakkai zasshi·Tomonari Sano
Nov 19, 2013·Journal of Cardiovascular Computed Tomography·Takeshi KondoKanako K Kumamaru
Nov 21, 2017·Nihon Hoshasen Gijutsu Gakkai zasshi·Hidekazu InageHaruyoshi Hoshito
Aug 23, 2019·Nihon Hoshasen Gijutsu Gakkai zasshi·Norisato TsudaShinichiro Oda
Oct 27, 2010·Nihon Hoshasen Gijutsu Gakkai zasshi·Takehiro AraiShinichi Takase

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