scholarly journals Internal carotid artery velocities in patients with unilateral non-arteritic anterior ischemic optic neuropathy

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Karen Bulan Reyes
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Optic Neuropathy ◽  
Internal Carotid ◽  
Peak Systolic Velocity ◽  
Contralateral Side ◽  
Anterior Ischemic Optic Neuropathy ◽  
Ischemic Optic Neuropathy ◽  
Significant Difference ◽  
Control Study

Objective: This study aims to evaluate and compare the proximal, medial, and distal segments of internal carotid artery (ICA) peak systolic velocities (PSV) in patients with nonarteritic anterior ischemic optic neuropathy (NA-AION) in one eye against the contralateral side with normal eye findings using doppler ultrasound. Methods:  This is a single-center,  prospective, case control study of five patients with unilateral NA-AION.  The peak systolic velocity (PSV) of the proximal, medial, and distal segments of the ICAs on both sides, one side with NA-AION while the contralateral side had normal eye findings, were compared and analyzed. Results: Four females and one male with a mean age of 59 years (SD = 17 years) were included. PSV of the ICA was measured in three segments: Proximal (PICA), Medial (MICA), and Distal (DICA). Mean PSV of eyes with NA-AION was 143cm/sec (SD= 177cm/sec), 159 cm/sec (SD=189 cm/sec), 98 cm/sec (SD=34cm/sec) for PICA, MICA and DICA respectively. Mean PSV of contralateral side without NA-AION was 95cm/sec (SD= 72cm/sec), 101 cm/sec (SD=53cm/sec), 140cm/sec (SD=60 cm/sec) for PICA, MICA and DICA respectively. There was no statistically significant difference between the two groups along the three segments (T-test PICAp=0.369, MICAp=0.402, DICAp=0.112). Conclusion: Mean PSV was higher in eyes with NA-AION at the proximal and medial segments of the ICA, while it was lower at the distal segments compared to the contralateral non-NA-AION side. 

scholarly journals Ischemic Optic Neuropathy Associated With Internal Carotid Artery Dissection

1998 ◽  
Vol 55 (5) ◽  
pp. 715 ◽  
Author(s):  
Valérie Biousse ◽  
Monique Schaison ◽  
Pierre-Jean Touboul ◽  
Jacques D'Anglejan-Chatillon ◽  
Marie-Germaine Bousser
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Optic Neuropathy ◽  
Internal Carotid ◽  
Carotid Artery Dissection ◽  
Artery Dissection ◽  
Ischemic Optic Neuropathy ◽  
Internal Carotid Artery Dissection

scholarly journals Retinal Vascular Changes with Non-Arteritis Anterior Ischemic Optic Neuropathy Assessed with IVAN Analysis

2020 ◽  
Author(s):  
Longli Zhang ◽  
Kaiwen Hei ◽  
Yifeng Ke ◽  
Heng Zhang ◽  
Xiaorong Li ◽  
...  
Keyword(s):  
Risk Factors ◽  
Optic Neuropathy ◽  
Case Control Study ◽  
Anterior Ischemic Optic Neuropathy ◽  
Ischemic Optic Neuropathy ◽  
Vascular Changes ◽  
Anova Analysis ◽  
Significant Difference ◽  
Retinal Vascular Caliber ◽  
Control Study

Abstract Background To assess the vascular changes associated with non-arteritis anterior ischemic optic neuropathy (NAION) by using integrative vessel analysis (IVAN) and risk factors associated with NAION. Methods We performed a case-control study of 120 patients, including 40 NAION patients during July 2015 to July 2019. Patients were divided into Normal, hypertension and NAION groups. IVAN was conducted to evaluate the caliber of retinal vessels. In addition, we also analyzed risk factors (age, gender and BMI) to identify their association with NAION. Results 84 women and 36 men were involved in our study, the average age was 58 ± 9.98 years. CRAE, CRVE and AVR in the whole patients were 154.54 ± 21.53 µm, 252.22 ± 15.88 µm and 0.64, respectively. ANOVA analysis showed significant difference of CRAE [F (2,116) = 4.203, p = 0.017], CRVE [F (2,116) = 49.91, p < 0.001] and AVR [F (2,116) = 13.81, p < 0.0001] between each group, NAION group had wider CRAE and CRVE, while smaller AVR. BMI value showed negative correlation with CRAE in NAION group, while positively with CRVE. Conclusion Retinal vascular caliber can be used as an indicator to evaluate the NAION. Our study suggested that an assessment of retinal vascular caliber may offer insights into the development of NAION.

scholarly journals Research on Association of the Diameter of the Internal Carotid Artery Siphon and Nonarteritic Anterior Ischaemic Optic Neuropathy

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Zhiyong Fu ◽  
Hongyang Li ◽  
Wei Wang ◽  
Yanling Wang
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Optic Neuropathy ◽  
Internal Carotid ◽  
Resistance Index ◽  
Control Group ◽  
Observation Group ◽  
Significant Difference ◽  
Ischaemic Optic Neuropathy ◽  
Anterior Ischaemic Optic Neuropathy

Objective. To investigate the association of the diameter of the internal carotid artery siphon (ICAS) and nonarteritic anterior ischaemic optic neuropathy (NAION). Methods. Thirty patients clinically diagnosed with NAION (unilateral affected) who presented to Beijing Friendship Hospital from January 2017 to October 2018 were selected. The eyes suffered from NAION were enrolled as the observation group, and the fellow healthy eyes were enrolled as the control group. The following indexes were measured: diameter of the ICAS and the ophthalmic artery (OA), intima-media thickness (IMT) of the internal carotid artery (ICA), degree of stenosis of the ICA and plaque formation, and hemodynamic parameters of the ICA and the short posterior ciliary arteries (SPCAs). All the values were compared between the two groups. Results. The diameter of the ICAS in the observation group (0.30 ± 0.07 cm) significantly narrowed compared with that of the control group (0.32 ± 0.06 cm) (P<0.05), but the diameter of the OA of the two groups had no significant difference. The detection rate of carotid atherosclerosis plaque, the average blood flow velocity (Vm), and the resistance index (RI) of the ICA in the observation group (46.67%, 26.81 ± 1.78 cm/s, and 0.72 ± 0.06) had significant differences compared with those of the control group (16.67%, 28.19 ± 2.75 cm/s, and 0.70 ± 0.05) (P<0.05), but the gradings of ICA stenosis and IMT between the two groups had no significant differences. The peak systolic velocity (PSV) and the end diastolic velocity (EDV) of the SPCAs in the observation group (10.72 ± 2.88 cm/s and 3.43 ± 1.01 cm/s) were significantly lower than those of the control group (13.62 ± 3.93 cm/s and 4.59 ± 1.71 cm/s) (P<0.05), but the RI of the SPCAs of the two groups had no significant differences. Conclusion. The diameter of the ICAS has a close relationship with NAION.

scholarly journals Diagnosis of ischemic optic neuropathy caused by dissection of the internal carotid artery

Medicine ◽  
2020 ◽  
Vol 99 (33) ◽  
pp. e20034
Author(s):  
Xiangrong Zheng ◽  
Yunpeng Wang ◽  
Guocang Chen ◽  
Chuanyong Ma ◽  
Weiming Yan ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Optic Neuropathy ◽  
Internal Carotid ◽  
Ischemic Optic Neuropathy

scholarly journals Imageology of internal carotid artery siphon in non-arteritic anterior ischaemic optic neuropathy

2020 ◽  
Vol 13 (12) ◽  
pp. 1941-1947
Author(s):  
Zhi-Yong Fu ◽  
Yan-Ling Wang
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Optic Neuropathy ◽  
Internal Carotid ◽  
Resistance Index ◽  
Unaffected Side ◽  
Significant Difference ◽  
Ischaemic Optic Neuropathy ◽  
Anterior Ischaemic Optic Neuropathy

AIM: To evaluate whether narrowing of internal carotid artery siphon (ICAS) may increase the risk of developing non-arteritic anterior ischaemic optic neuropathy (NAION). METHODS: Totally 30 consecutive patients who had unilateral NAION and 30 gender-matched control subjects were recruited in the present study. The diameter of ICAS of all the participants were measured using head-and-neck computed tomographic angiography (CTA). Color doppler flow imaging (CDI) was used to measure the haemodynamics parameters of ICAS and short posterior ciliary arteries (SPCAs) in all subjects. Comparison of parameters between the NAION patients and controls as well as between the two sides within the patients were performed. The correlation between the diameter of ICAS and NAION was analyzed. RESULTS: A comparison of parameters between the affected side of the NAION patients and the controls, including the diameter of ICAS, the resistance index (RI) of ICAS, the blood flow velocities of SPCAs and RI of SPCAs, showed significantly difference (P<0.01), while there was no significant difference in terms of the mean blood flow velocity (Vm) of ICAS; Similar results were found while comparing all the measurements of the affected and unaffected side of patients (P for RI of SPCAs <0.05). No marked difference was detected in nearly all parameters except for RI of ICAS and SPCAs between the unaffected side of the NAION patients and the controls (P<0.05). The diameter of ICAS were significantly positive correlated with both peak systolic velocity (PSV) of SPCAs and end diastolic velocity (EDV) of SPCAs in patients with NAION (r=0.514, P<0.01 and r=0.418, P<0.05, respectively). CONCLUSION: Narrowing of ICAS may increase the risk of developing NAION.

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