1
|
Yin K, Whitaker L, Hojo E, McLenachan S, Walker J, McKillop G, Stubbs C, Priest L, Cruz M, Roberts N, Critchley H. Measurement of changes in uterine and fibroid volume during treatment of heavy menstrual bleeding (HMB). Hum Reprod Open 2023; 2023:hoad021. [PMID: 37304815 PMCID: PMC10247393 DOI: 10.1093/hropen/hoad021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/28/2023] [Indexed: 06/13/2023] Open
Abstract
STUDY QUESTION Does application of an unbiased method for analysis of magnetic resonance (MR) images reveal any effect on uterine or fibroid volume from treatment of heavy menstrual bleeding (HMB) with three 12-week courses of the selective progesterone receptor modulator ulipristal acetate (SPRM-UPA)? SUMMARY ANSWER Application of an unbiased method for analysis of MR images showed that treatment of HMB with SPRM-UPA was not associated with a significant reduction in the volume of the uterus or in the volume of uterine fibroids. WHAT IS KNOWN ALREADY SPRM-UPA shows therapeutic efficacy for treating HMB. However, the mechanism of action (MoA) is not well understood and there have been mixed reports, using potentially biased methodology, regarding whether SPRM-UPA has an effect on the volume of the uterus and fibroids. STUDY DESIGN SIZE DURATION In a prospective clinical study (with no comparator), 19 women with HMB were treated over a period of 12 months with SPRM-UPA and uterine and fibroid size were assessed with high resolution structural MRI and stereology. PARTICIPANTS/MATERIALS SETTING METHODS A cohort of 19 women aged 38-52 years (8 with and 11 without fibroids) were treated with three 12-week courses of 5 mg SPRM-UPA given daily, with four weeks off medication in-between treatment courses. Unbiased estimates of the volume of uterus and total volume of fibroids were obtained at baseline, and after 6 and 12 months of treatment, by using the Cavalieri method of modern design-based stereology in combination with magnetic resonance imaging (MRI). MAIN RESULTS AND THE ROLE OF CHANCE Bland-Altman plots showed good intra-rater repeatability and good inter-rater reproducibility for measurement of the volume of both fibroids and the uterus. For the total patient cohort, two-way ANOVA did not show a significant reduction in the volume of the uterus after two or three treatment courses of SPRM-UPA (P = 0.51), which was also the case when the groups of women with and without fibroids were considered separately (P = 0.63). One-way ANOVA did not show a significant reduction in total fibroid volume in the eight patients with fibroids (P = 0.17). LIMITATIONS REASONS FOR CAUTION The study has been performed in a relatively small cohort of women and simulations that have subsequently been performed using the acquired data have shown that for three time points and a group size of up to 50, with alpha (Type I Error) and beta (Type II Error) set to 95% significance and 80% power, respectively, at least 35 patients would need to be recruited in order for the null hypothesis (that there is no significant reduction in total fibroid volume) to be potentially rejected. WIDER IMPLICATIONS OF THE FINDINGS The imaging protocol that we have developed represents a generic paradigm for measuring the volume of the uterus and uterine fibroids that can be readily incorporated in future studies of medical treatments of HMB. In the present study, SPRM-UPA failed to produce a significant reduction in the volume of the uterus or the total volume of fibroids (which were present in approximately half of the patients) after either two or three 12-week courses of treatment. This finding represents a new insight in respect of the management of HMB using treatment strategies that target hormone-dependence. STUDY FUNDING/COMPETING INTERESTS The UPA Versus Conventional Management of HMB (UCON) trial was funded by the EME Programme (Medical Research Council (MRC) and National Institutes of Health Research (NIHR)) (12/206/52). The views expressed in this publication are those of the authors and not necessarily those of the Medical Research Council, National Institute for Health Research, or Department of Health and Social Care.Medical Research Council (MRC) Centre grants to the Centre for Reproductive Health (CRH) (G1002033 and MR/N022556/1) are also gratefully acknowledged. H.C. has clinical research support for laboratory consumables and staff from Bayer AG and provides consultancy advice (All paid to Institution) for Bayer AG, PregLem SA, Gedeon Richter, Vifor Pharma UK Ltd, AbbVie Inc., and Myovant Sciences GmbH. H.C. has received royalties from UpToDate for an article on abnormal uterine bleeding. L.W. has received grant funding from Roche Diagnostics (Paid to Institution). All other authors have no conflicts to declare. TRIAL REGISTRATION NUMBER The study reported here is an embedded mechanism of action study (no comparator) within the UCON clinical trial (registration ISRCTN: 20426843).
Collapse
Affiliation(s)
- K Yin
- Edinburgh Imaging Facility QMRI, University of Edinburgh, Edinburgh, UK
| | - L Whitaker
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| | - E Hojo
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| | - S McLenachan
- Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - J Walker
- Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - G McKillop
- Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - C Stubbs
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - L Priest
- Birmingham Clinical Trials Unit, University of Birmingham, Birmingham, UK
| | - M Cruz
- Departamento de Matemáticas Estadística y Computación, University of Cantabria, Santander, Spain
| | - N Roberts
- Edinburgh Imaging Facility QMRI, University of Edinburgh, Edinburgh, UK
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| | - H Critchley
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| |
Collapse
|
2
|
Andrews JPM, McKillop G, Dweck MR. Incidental finding of large pneumothorax on Cardiac MR scan. BMC Med Imaging 2018; 18:3. [PMID: 29433494 PMCID: PMC5810119 DOI: 10.1186/s12880-017-0240-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 12/15/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We believe this is the first case report of a pneumothorax being identified using cardiac magnetic resonance imaging. This case also illustrates the haemodynamic effect a large pneumothorax can have on right ventricular filling in diastole. CASE PRESENTATION A 26-year-old attended for an interval follow up Cardiac Magnetic Resonance (CMR) of his thoracic aorta after a thoracic co-arctation repair aged 3. He was found to have an incidental large pneumothorax by the reporting cardiology fellow which was confirmed by the on-call radiologist. The pneumothorax was most notable for its compression of the right ventricle in diastole. Although the patient had worrying features on CMR imaging, he remained clinically stable and a conservative approach to management saw the pneumothorax resolve after a 3 week period. CONCLUSIONS Pneumothoraces are important, potentially life threatening conditions. Although very rarely identified on MR imaging, radiographers and reporting doctors should be aware of their key features. This case serves to identify not only the abnormal lung parenchymal features but also the striking compressional effect of the pneumothorax on the right ventricle in diastole. Indeed we believe this is the first case report of a pneumothorax identified on CMR imaging.
Collapse
Affiliation(s)
- J P M Andrews
- Centre for Cardiovascular Sciences, Chancellors Building, University of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SB, UK. .,Edinburgh Heart Centre, Royal infirmary of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SA, UK.
| | - G McKillop
- Department of Radiology, Royal Infirmary of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SA, UK
| | - M R Dweck
- Centre for Cardiovascular Sciences, Chancellors Building, University of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SB, UK.,Edinburgh Heart Centre, Royal infirmary of Edinburgh, 49 Little France Crescent, Edinburgh, EH16 4SA, UK
| |
Collapse
|
3
|
Williams MC, Weir NW, Mirsadraee S, Millar F, Baird A, Minns F, Uren NG, McKillop G, Bull RK, van Beek EJR, Reid JH, Newby DE. Iterative reconstruction and individualized automatic tube current selection reduce radiation dose while maintaining image quality in 320-multidetector computed tomography coronary angiography. Clin Radiol 2013; 68:e570-7. [PMID: 23838086 PMCID: PMC3807656 DOI: 10.1016/j.crad.2013.05.098] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/13/2013] [Accepted: 05/29/2013] [Indexed: 01/22/2023]
Abstract
AIM To assess the effect of two iterative reconstruction algorithms (AIDR and AIDR3D) and individualized automatic tube current selection on radiation dose and image quality in computed tomography coronary angiography (CTCA). MATERIALS AND METHODS In a single-centre cohort study, 942 patients underwent electrocardiogram-gated CTCA using a 320-multidetector CT system. Images from group 1 (n = 228) were reconstructed with a filtered back projection algorithm (Quantum Denoising Software, QDS+). Iterative reconstruction was used for group 2 (AIDR, n = 379) and group 3 (AIDR3D, n = 335). Tube current was selected based on body mass index (BMI) for groups 1 and 2, and selected automatically based on scout image attenuation for group 3. Subjective image quality was graded on a four-point scale (1 = excellent, 4 = non-diagnostic). RESULTS There were no differences in age (p = 0.975), body mass index (p = 0.435), or heart rate (p = 0.746) between the groups. Image quality improved with iterative reconstruction and automatic tube current selection [1.3 (95% confidence intervals (CI): 1.2-1.4), 1.2 (1.1-1.2) and 1.1 (1-1.2) respectively; p < 0.001] and radiation dose decreased [274 (260-290), 242 (230-253) and 168 (156-180) mGy cm, respectively; p < 0.001]. CONCLUSION The application of the latest iterative reconstruction algorithm and individualized automatic tube current selection can substantially reduce radiation dose whilst improving image quality in CTCA.
Collapse
Affiliation(s)
- M C Williams
- University of Edinburgh/British Heart Foundation Centre for Cardiovascular Science, Edinburgh, UK.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
4
|
Williams MC, Weir NW, Mirsadraee S, Scott AE, Uren NG, McKillop G, Bull RK, van Beek EJR, Reid JH, Newby DE. 116 IMAGE QUALITY AND RADIATION DOSE WITH SINGLE HEART BEAT 320 MULTIDETECTOR CT CORONARY ANGIOGRAPHY. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
5
|
Dweck MR, Jones C, Joshi N, White A, Fletcher AM, Richardson H, McKillop G, van Beek EJR, Boon NA, Rudd JHF, Newby DE. B Assessment of valvular calcification and inflammation by positron emission tomography. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877a.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
6
|
Williams MC, Reid JH, McKillop G, Weir NW, van Beek EJR, Uren NG, Newby DE. Cardiac and coronary CT comprehensive imaging approach in the assessment of coronary heart disease. Heart 2011; 97:1198-205. [DOI: 10.1136/heartjnl-2011-300037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
7
|
Richards JMJ, Semple SI, Gillivray TJM, Gray C, Langrish JP, Williams M, Dweck M, Wallace W, McKillop G, Chalmers RTA, Garden OJ, Newby DE. D Uptake of ultrasmall superparamagnetic particles of iron oxide predicts growth in abdominal aortic aneurysms: a Pilot Study. Heart 2011. [DOI: 10.1136/heartjnl-2011-300110.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
8
|
Jenkins SMM, Johnston N, Hawkins NM, Messow CM, Shand J, Hogg KJ, Eteiba H, McKillop G, Goodfield NER, McConnachie A, Dunn FG. Limited clinical utility of CT coronary angiography in a district hospital setting. QJM 2011; 104:49-57. [PMID: 20847015 DOI: 10.1093/qjmed/hcq163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Studies have demonstrated considerable accuracy of multi-slice CT coronary angiography (MSCT-CA) in comparison to invasive coronary angiography (I-CA) for evaluating coronary artery disease (CAD). The extent to which published MSCT-CA accuracy parameters are transferable to routine practice beyond high-volume tertiary centres is unknown. AIM To determine the accuracy of MSCT-CA for the detection of CAD in a Scottish district general hospital. DESIGN Prospective study of diagnostic accuracy. METHOD One hundred patients with suspected CAD recruited from two Glasgow hospitals underwent both MSCT-CA (Philips Brilliance 40 × 0.625 collimation, 50-200 ms temporal resolution) and I-CA. Studies were reported by independent, blinded radiologists and cardiologists and compared using the AHA 15-segment model. RESULTS Of 100 patients [55 male, 45 female, mean (SD) age 58.0 (10.7) years], 59 and 41% had low-intermediate and high pre-test probabilities of significant CAD, respectively. Mean (SD) heart rate during MSCT-CA was 68.8 (9.0) bpm. Fifty-seven per cent of patients had coronary artery calcification and 35% were obese. Patient prevalence of CAD was 38%. Per-patient sensitivity, specificity, positive and negative (NPV) predictive values for MSCT-CA were 92.1, 47.5, 52.2 and 90.6%, respectively. NPV was reduced to 75.0% in the high pre-test probability group. Specificity was compromised in patients with sub-optimally controlled heart rates, calcified arteries and elevated BMI. CONCLUSION Forty-Slice MSCT-CA has a high NPV for ruling out significant CAD when performed in a district hospital setting in patients with low-intermediate pre-test probability and minimal arterial calcification. Specificity is compromised by clinically appropriate strategies for dealing with unevaluable studies. Effective heart rate control during MSCT-CA is imperative. National guidelines should be utilized to govern patient selection and direct MSCT-CA reporter training to ensure quality control.
Collapse
Affiliation(s)
- S M M Jenkins
- Department of Cardiology, Stobhill Hospital, 133 Balornock Road, Glasgow G21 3UW, UK.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Richards JMJ, Shaw CA, Lang NN, Semple SI, Crawford JH, Mills NL, Dhaliwal K, Simpson AJ, Burdess A, Roddie H, McKillop G, Atkinson AP, Forrest E, Connolly TM, Feuerstein GZ, Barclay GR, Turner ML, Newby DE. 074 In vivo cell tracking of superparamagnetic iron oxide-labelled mononuclear cells in humans. Heart 2010. [DOI: 10.1136/hrt.2010.195966.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
10
|
McKillop G. Text book of radiology and imaging. Clin Radiol 2003. [DOI: 10.1016/s0009-9260(03)00191-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
11
|
Abstract
PURPOSE To measure blood flow velocity in the ophthalmic artery (OA) and central retinal artery (CRA) in patients with diabetic retinopathy. SUBJECTS AND METHODS 62 age-matched subjects divided into 3 groups: nondiabetic controls (n=17); diabetics with no clinical retinopathy or background changes (n=24); diabetics with either pre-proliferative or proliferative retinopathy (n=21). Colour Doppler imaging was performed on supine patients by one masked observer using the Acuson 128 machine. RESULTS There was a statistically significant (p<0.05) decrease in both the peak systolic velocity (PSV 0.073 m/s) and end diastolic velocity (EDV 0.014 m/s) of the central retinal artery in the pre-proliferative/proliferative group compared to the no retinopathy/background retinopathy group (PSV 0.096 m/s, EDV 0.024 m/s) and the control group (PSV 0.142 m/s, EDV 0.029 m/s). The resistance index of the ophthalmic artery was significantly increased in both the preproliferative/proliferative (0.81) and the no retinopathy/background group (0.81) compared to controls (0.72). CONCLUSION Reduced blood flow velocity was found in the CRA of diabetic patients and appeared to become further reduced with the progression of retinopathy. This suggests that monitoring with Colour Doppler imaging may have predictive power in identifying those at greatest risk of developing sight threatening proliferative disease. The resistance index of the OA was increased in diabetics compared to controls.
Collapse
Affiliation(s)
- J R MacKinnon
- Princess Alexandra Eye Pavilion, Royal Infirmary of Edinburgh NHS Trust, Scotland
| | | | | | | | | | | |
Collapse
|
12
|
Butt Z, O'Brien C, McKillop G, Aspinall P, Allan P. Color Doppler imaging in untreated high- and normal-pressure open-angle glaucoma. Invest Ophthalmol Vis Sci 1997; 38:690-6. [PMID: 9071223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
PURPOSE To evaluate ocular blood flow velocity indices in untreated primary open-angle glaucoma (POAG) and normal pressure glaucoma (NPG). METHODS Twenty-five untreated patients with NPG, 23 untreated patients with POAG, and 26 age-matched normal control subjects underwent color Doppler imaging for the measurement of blood flow velocity in the central retinal and ophthalmic arteries. Neither the patients nor the control subjects were using systemic beta-blockers or calcium channel blockers. After log transformation of non-normal data, group differences were compared with a one-way analysis of variance followed by unpaired t-test with the Bonferroni correction. Statistical significance was set at P < 0.05. RESULTS The central retinal artery end diastolic velocity was significantly lower in patients with POAG than in normal subjects. The ophthalmic artery peak systolic velocity (PSV) was significantly greater in patients with POAG than in those with NPG and normal subjects. The resistance index (RI) of both the ophthalmic and central retinal arteries was significantly greater in patients with POAG than in normal subjects, and the central retinal artery RI was significantly greater in those with NPG than in normal subjects. Systemic pulse pressure and systolic blood pressure were significantly greater in patients with POAG compared with normal subjects. Multiple regression analysis showed a significant relation between ophthalmic artery PSV and intraocular pressure (but not with any of the cardiovascular parameters) in the POAG group. Chi-square analysis found significantly more systemic vascular disease in patients with NPG and POAG compared with that of normal subjects. CONCLUSIONS There was an increased resistance to blood flow in the central retinal artery of untreated patients with NPG and POAG and also in the ophthalmic artery of patients with POAG. The ophthalmic artery peak systolic velocity was elevated in untreated patients with POAG. Altered ocular circulation (with different patterns of presentation) appears to be common to patients with NPG and patients with POAG.
Collapse
Affiliation(s)
- Z Butt
- Princess Alexandra Eye Pavilion, Royal Infirmary of Edinburgh, Scotland
| | | | | | | | | |
Collapse
|
13
|
Ghanchi FD, Williamson TH, Lim CS, Butt Z, Baxter GM, McKillop G, O'Brien C. Colour Doppler imaging in giant cell (temporal) arteritis: serial examination and comparison with non-arteritic anterior ischaemic optic neuropathy. Eye (Lond) 1996; 10 ( Pt 4):459-64. [PMID: 8944098 DOI: 10.1038/eye.1996.101] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The ophthalmological manifestations of giant cell arteritis (GCA) present a difficult diagnostic and management problem to the ophthalmologist. The orbital circulation is frequently involved in the disease process. The effects of GCA on orbital blood flow assessed by colour Doppler imaging (CDI) were investigated in this study. Serial CDI examinations of the orbital blood vessels were performed (at presentation, 2 days, 1 week and at 1 month) on 7 patients with GCA. CDI examination at presentation was also performed on 4 patients with non-arteritic anterior ischaemic optic neuropathy (AION) for comparison. Blood flow could not be detected in up to three arteries in the affected (ipsilateral) orbit of 6 GCA patients at presentation. Five of these patients were also found to have undetectable blood flow in the posterior ciliary arteries of the contralateral orbit. Serial CDI examination revealed blood flow alterations in arteritic patients despite treatment. Return of blood flow to normal was slow, and related to the clinical features. By contrast, only 1 of the patients with non-arteritic AION showed undetectable blood flow in a posterior ciliary artery. GCA leads to widespread and prolonged alterations in orbital blood flow. CDI allows the detection and monitoring of such alterations in orbital blood flow, which correlate with the clinical features of GCA. Serial CDI examinations in GCA may be used to aid management decisions.
Collapse
Affiliation(s)
- F D Ghanchi
- Tennent Institute of Ophthalmology, Western Infirmary, Glasgow, UK
| | | | | | | | | | | | | |
Collapse
|
14
|
Affiliation(s)
- G McKillop
- Department of Clinical Radiology, Royal Infirmary of Edinburgh
| | | |
Collapse
|
15
|
Affiliation(s)
- G McKillop
- Department of Radiology, Royal Infirmary of Edinburgh, UK
| | | |
Collapse
|
16
|
Butt Z, McKillop G, O'Brien C, Allan P, Aspinall P. Measurement of ocular blood flow velocity using colour Doppler imaging in low tension glaucoma. Eye (Lond) 1995; 9 ( Pt 1):29-33. [PMID: 7713247 DOI: 10.1038/eye.1995.4] [Citation(s) in RCA: 78] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The purpose of this study was to compare the velocity of blood flow and vascular resistance measured by colour Doppler imaging in the ophthalmic and central retinal arteries in 34 eyes of 34 patients (mean age 68.1 years) with low tension glaucoma (LTG) and 17 eyes of 17 age-matched normal controls (mean age 65.2 years). The Acuson 128 machine (using a 7.5 MHz probe) was used to measure peak systolic velocity (PSV), end-diastolic velocity (EDV) and resistive index (RI). The EDV of the ophthalmic artery (OA) in the LTG was significantly (p = 0.04) less than in the normal control group. There was a significant (p = 0.02) increase in the vascular RI of both the OA and central retinal artery in the LTG group compared with the normal controls. The OA RI increased with age (r = 0.61, p = 0.0001), and the OA EDV decreased with age (r = -0.50, p = 0.003), in the LTG group but not in the normal control group. The results suggest an increased resistance to blood flow in the ophthalmic and central retinal arteries of LTG patients.
Collapse
Affiliation(s)
- Z Butt
- Radiology Department, Royal Infirmary of Edinburgh, UK
| | | | | | | | | |
Collapse
|
17
|
Baxter GM, Williamson TH, McKillop G, Dutton GN. Color Doppler ultrasound of orbital and optic nerve blood flow: effects of posture and timolol 0.5%. Invest Ophthalmol Vis Sci 1992; 33:604-10. [PMID: 1544785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Color Doppler ultrasound allows simultaneous imaging with real-time ultrasound and superimposed color-coded vascular flow, allowing visualization of vessels previously beyond the resolution of conventional imaging, such as those in the orbit. With this technique, 20 healthy volunteers were studied. Three regional vessels named 1, 2, and 3 were identified. No significant difference in maximum or minimum blood velocity or resistive index was detected between vessels 1 and 2, although significant differences were noted between both these vessels and vessel 3 (P less than 0.01 and P less than 0.001, respectively). These regional variations are unaffected by small but significant rises in pulse (P less than 0.05) and diastolic blood pressure (P less than 0.01) induced by postural change. No significant change within each vessel was recorded in response to posture, reflecting autoregulation within these vessels. Using a similar technique, 10 healthy volunteers were studied at baseline and at 2 hr and 3 d following the unilateral instillation of 0.5% timolol eye drops. A fall in resistive index was recorded in vessel 3 for both eyes (P less than 0.05, timolol administered eye; P less than 0.01 timolol-free eye). This effect was independent of any simultaneous fall in intraocular pressure that occurred only in the eye receiving timolol drops (P less than 0.01). These results support the presence of B receptors in the vessels at the optic nerve head (vessel 3). A fall in resistive index should not compromise the blood supply in this region, and may even increase it.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- G M Baxter
- Department of Radiology, Western Infirmary, Glasgow, Scotland, UK
| | | | | | | |
Collapse
|
18
|
Abstract
We performed echocardiographic evaluation of 20 male veteran endurance runners (mean age 56 +/- 7 years) and compared them with a group of age-matched controls. All the runners had run at least 25 miles per week for more than 25 years. Although only four athletes showed voltage ECG evidence of left ventricular hypertrophy, using echocardiography, 10 athletes had evidence of left ventricular hypertrophy. Thus electrocardiography is insufficiently sensitive to detect LVH in this group (10%). Left ventricular posterior wall thickness and left ventricular mass were significantly greater in the athletes, the difference becoming more marked when LV mass was corrected for body surface area and, consequently, the wall thickness: cavity diameter ratio was increased (P less than 0.04). There was no difference between the two groups in left ventricular performance and no correlation between left ventricular mass and running ability. Thus, veteran runners develop structural cardiac changes similar to younger power-trained athletes and do not show characteristics normally expected of 'volume overload' which is thought to occur in running.
Collapse
Affiliation(s)
- R J Northcote
- Department of Cardiology, Victoria Infirmary, Glasgow, U.K
| | | | | | | |
Collapse
|
19
|
Abstract
Four male bodybuilders who had started taking anabolic steroids were monitored during exercise. Most metabolic indicators were similar to bodybuilders not taking steroids; i.e. metabolic acidosis with little change in glucose. However, there is a marked elevation of creatine kinase.
Collapse
Affiliation(s)
- G McKillop
- Department of Medical Cardiology, Victoria Infirmary, Glasgow
| | | | | | | |
Collapse
|
20
|
McKillop G, Ballantyne FC, Borland W, Scullion R, Kay JW, Fell GS, Ballantyne D. The short-term metabolic effects of strenuous exercise in bodybuilders. Br J Sports Med 1988; 22:107-8. [PMID: 3148352 PMCID: PMC1478564 DOI: 10.1136/bjsm.22.3.107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- G McKillop
- Department of Medical Cardiology, Victoria Infirmary Glasgow
| | | | | | | | | | | | | |
Collapse
|
21
|
Canning G, McKillop G, Slater SD. Dilutional hyponatraemia due to hydrochlorothiazide plus amiloride (Moduretic): not to be mistaken for the syndrome of inappropriate secretion of antidiuretic hormone (SIADH). Br J Clin Pract 1988; 42:41-2. [PMID: 3196641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
22
|
Abstract
The use of anabolic steroids to augment athletic performance is widespread. It is known that these drugs can adversely affect lipoproteins in normal volunteers, leading to increased cholesterol and low density lipoprotein and depressed high density lipoprotein. It has been shown that endurance type exercise can lead to beneficial effects on lipoproteins but the effects of power exercise are less clear-cut and made more difficult to interpret by prior anabolic steroid use. This paper details the lipoprotein results in 24 subjects, eight sedentary controls, eight non-steroid and eight steroid using bodybuilders. The results revealed no significant difference between sedentary controls and non-steroid bodybuilders suggesting that this form of training does not cause beneficial effects on lipoproteins. However, the steroid-using groups had higher cholesterol and low density lipoprotein, with lower high density lipoprotein, high density lipoprotein2, high density lipoprotein3 and high density lipoprotein2/high density lipoprotein3 ratios compared to the other two groups. The long-term effects of such results may be an increased risk of atherosclerosis and requires long-term follow-up.
Collapse
Affiliation(s)
- G McKillop
- Department of Medical Cardiology, Victoria Infirmary, Glasgow, U.K
| | | |
Collapse
|
23
|
Abstract
A 22 year old heroin addict was admitted with tonic-clonic seizures, confusion and agitation 10 hours after taking mefenamic acid 5 grams orally and 2.25 grams intravenously. This appears to be the first recorded case of intravenous mefenamic acid abuse and, although not fatal, is a cause of concern. This is a commonly used drug and its seizure inducing potential is well recognised. It may therefore be worthwhile considering the possibility of intravenous abuse of mefenamic acid in heroin addicts admitted with confusion or seizures.
Collapse
|
24
|
Abstract
Forty one amateur body builders in a West of Scotland gymnasium were questioned about body building drug usage during the period January 1984 to January 1985. Eight out of 41 (19.5%) had used drugs to enhance their physique and performance. Anabolic and androgenic agents were mainly used but diuretics, thyroxine and human chorionic gonadotrophin were also used. Those who took drugs, in all cases, took combinations of drugs. Drug dosage was generally much in excess of that normally recommended, though there were no serious side effects at the time of the study. If this experience was typical nationwide it would represent a significant number of body builders abusing drugs. In no case was there any medical supervision.
Collapse
|
25
|
Abstract
As the effects of anabolic steroids on left ventricular structure and function are unknown, we carried out clinical examination, 12 lead electrocardiography and echocardiography on a 23 year old male bodybuilder using these drugs. In this subject we found values of ECG voltage criteria, left ventricular-mass, posterior wall and interventricular septal thickness which exceeded those found in normal subjects and also in other competitive, power athletes. Despite these values, however, ejection fraction remained normal. This would suggest that anabolic steroids perhaps have a direct effect on the myocardium, in addition to the effects of training, but whether this is of pathological significance is unclear.
Collapse
|
26
|
McKillop G, Fallon M, Slater SD. Possible interaction between heparin and a sulphonylurea a cause of prolonged hypoglycaemia? Br Med J (Clin Res Ed) 1986; 293:1073. [PMID: 3094779 PMCID: PMC1341920 DOI: 10.1136/bmj.293.6554.1073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|