scholarly journals Acute vascular occlusion in horses: effects on skeletal muscle size and blood flow

2004 ◽  
Vol 1 (4) ◽  
pp. 239-243 ◽  
Author(s):  
T Abe ◽  
CF Kearns ◽  
HC Manso Filho ◽  
Y Sato ◽  
M Sleeper ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Vascular Occlusion ◽  
Muscle Thickness ◽  
Muscle Size ◽  
Flexor Muscle ◽  
Mechanical Transducer ◽  
Occlusion Cuff ◽  
Pulsed Wave Doppler ◽  
Measurement Time Point ◽  
The Right

AbstractThe purpose of this study was to demonstrate whether acute vascular occlusion was safe and if it would result in changes to limb muscle size in horses. Six healthy, unfit Standardbred mares were used. Horses (standing at rest) wore an occlusion cuff at the most proximal position of the left forelimb. The right forelimb was used as control. An occlusion pressure of 200 mmHg was set for 5 min followed by a 2 min recovery. Three sets of occlusions were given to each horse. Muscle thickness was measured using B-mode ultrasound. The circumference of the forelimb and first phalanx was measured using a flexible tape measure. Pulsed-wave Doppler was performed on the radialis artery with a 5–10 MHz mechanical transducer at baseline and at each occlusion. Peak flow velocity (PFV) and the flow velocity integral (FVI) were measured each time. Mid-forelimb, but not first phalanx, girth was increased (P<0.05) in the occluded but not in the control leg following occlusion. Extensor and flexor muscle thickness was increased (P<0.05) in the occluded but not in the control leg. There were no changes (P>0.05) in PFV or FVI at any measurement time point. Acute vascular occlusion may be a suitable and safe model for studying muscle hypertrophy in horses.

scholarly journals Effects of equal-volume resistance training with different training frequencies in muscle size and strength in trained men

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5020 ◽  
Author(s):  
Paulo Gentil ◽  
James Fisher ◽  
James Steele ◽  
Mario H. Campos ◽  
Marcelo H. Silva ◽  
...  
Keyword(s):  
Resistance Training ◽  
Muscle Thickness ◽  
Peak Torque ◽  
Muscle Size ◽  
Upper Body ◽  
Elbow Flexors ◽  
Flexor Muscle ◽  
Volume Resistance ◽  
Elbow Flexors And Extensors ◽  
One Year

Background The objective of the present study was to compare the effects of equal-volume resistance training (RT) performed with different training frequencies on muscle size and strength in trained young men. Methods Sixteen men with at least one year of RT experience were divided into two groups, G1 and G2, that trained each muscle group once and twice a week, respectively, for 10 weeks. Elbow flexor muscle thickness (MT) was measured using a B-Mode ultrasound and concentric peak torque of elbow extensors and flexors were assessed by an isokinetic dynamometer. Results ANOVA did not reveal group by time interactions for any variable, indicating no difference between groups for the changes in MT or PT of elbow flexors and extensors. Notwithstanding, MT of elbow flexors increased significantly (3.1%, P < 0.05) only in G1. PT of elbow flexors and extensors did not increase significantly for any group. Discussion The present study suggest that there were no differences in the results promoted by equal-volume resistance training performed once or twice a week on upper body muscle strength in trained men. Only the group performing one session per week significantly increased the MT of their elbow flexors. However, with either once or twice a week training, adaptations appear largely minimal in previously trained males.

scholarly journals Orbicularis Oculi Muscle Size and Function: Exploring the Influence of Aging and Exercise Training

Cosmetics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 29
Author(s):  
Takashi Abe ◽  
Jeremy P. Loenneke
Keyword(s):  
Older Adults ◽  
Exercise Training ◽  
Muscle Hypertrophy ◽  
Peak Velocity ◽  
Muscle Thickness ◽  
Muscle Size ◽  
Sphincter Muscle ◽  
Orbicularis Oculi Muscle ◽  
Orbicularis Oculi ◽  
And Function

The orbicularis oculi muscle is the sphincter muscle of the eyelids that blinks and closes the eyes. In this review, our aim was threefold: (1) to introduce the performance characteristics of blinking activity in young and older adults, (2) to discuss the influence of aging on the orbicularis oculi muscle in healthy adults, and (3) to provide information about the effect of facial exercise training on the orbicularis oculi muscle. To achieve the purpose of this review, a search using two electronic databases (PubMed and Scopus) and a search engine (Google Scholar) was conducted. The amplitude and peak velocity of spontaneously blinking behavior, which is an index of muscle function of the orbicularis oculi, appear to be affected by aging. The muscle thickness of the orbicularis oculi tends to be low in older adults, but there are issues that need to be examined further, such as differences in sex and measurement positions. There was no study on the effect of exercise training; however, the results of a highly trained man indicate that the orbicularis oculi muscles might elicit muscle hypertrophy through non-traditional resistance exercise.

scholarly journals Concomitant Partial Achilles Tendon Rupture and Lateral Luxation of the Superficial Digital Flexor Muscle Tendon in a Dog

VCOT Open ◽  
2021 ◽  
Vol 04 (01) ◽  
pp. e37-e40
Author(s):  
Hélène Dosseray ◽  
Claire Deroy-Bordenave
Keyword(s):  
Achilles Tendon ◽  
Achilles Tendon Rupture ◽  
Simultaneous Occurrence ◽  
Flexor Muscle ◽  
Screw Insertion ◽  
Superficial Digital Flexor Tendon ◽  
Fixation Screw ◽  
Pelvic Limb ◽  
The Right

AbstractThe aim of this study was to report a posttraumatic partial Achilles tendon (AT) rupture associated with lateral luxation of the superficial digital flexor tendon (SDFT) in a Whippet. This article is a brief communication. A Whippet was presented with posttraumatic plantigrade stance and non-load-bearing lameness of the right pelvic limb. The objective findings consisted in partial AT rupture and SDFT lateral luxation. Surgical treatment ensued: tenorrhaphy of the torn tendons and calcaneo-tibial screw insertion for tarsal immobilization, followed by suturing of the SDFT retinaculum. A casting bandage was employed for additional immobilization. Nonetheless, a bandage complication prompted the premature removal of the fixation screw and casting wrap. Complete functional recovery was achieved by the 20th postoperative week. The simultaneous occurrence of SDFT luxation and partial AT tear has not been reported in the literature before. The long-term postoperative functional outcome was highly satisfactory.

scholarly journals Cervical artery dissection—an easily neglected cause of stroke: a case report

BMC Neurology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Ya -Hui Lian ◽  
Xin Chen ◽  
De- Rui Kong ◽  
Wei Chen ◽  
Ming-Chao Shi ◽  
...  
Keyword(s):  
Young People ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Vascular Occlusion ◽  
Artery Dissection ◽  
High Signal ◽  
Cervical Artery Dissection ◽  
Cervical Artery ◽  
The Right

Abstract Background In recent years, the incidence of stroke has gradually increased in young people. There are many reasons causing stroke, including atherosclerosis, artery embolization, and cervical artery dissection and so on. However, cervical artery dissection is a major cause of stroke in young people. We present a case of ischemic stroke caused by dissection, whose distal vascular occlusion due to detachment of the thrombosis in the right internal carotid artery. Case presentation A 33-year-old male patient was admitted to the hospital because of stroke. Imaging examination showed that there was no visualization of the right middle cerebral artery and there were a large number of mural thrombus in the C1 segment of the right internal carotid artery. After emergency surgery, the patient had vascular recanalization and the symptoms were significantly improved. Magnetic resonance imaging showed a high signal in the C1 segment of the right internal carotid artery, the abnormal signal disappeared after antiplatelet therapy. Conclusions When a patient has symptoms of stroke, we need to explore the root cause of stroke. Especially in young people, cervical artery dissection is an important reason that can’t be ignored. Through review and analysis of this case, we hope to improve the understanding of radiologists and clinicians about the cervical artery dissection, reduce the rate of misdiagnosis, and improve patients’ prognosis.

scholarly journals The Association Between Notching of the Right Ventricular Outflow Tract Flow Velocity Doppler Envelope and Impaired Right Ventricular Function After Acute High-Altitude Exposure

2021 ◽  
Vol 12 ◽  
Author(s):  
Fangzhengyuan Yuan ◽  
Chuan Liu ◽  
Shiyong Yu ◽  
Shizhu Bian ◽  
Jie Yang ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Right Ventricular ◽  
Flow Velocity ◽  
Healthy Subjects ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Tricuspid Annulus ◽  
Doppler Flow ◽  
The Right ◽  
Rv Function

IntroductionPulmonary artery pressure (PAP) is increased and right ventricular (RV) function is well preserved in healthy subjects upon exposure to high altitude (HA). An increase in PAP may trigger notching of the right ventricular outflow tract Doppler flow velocity envelope (RVOT notch), which is associated with impaired RV function in patients with pulmonary hypertension. However, whether HA exposure can induce RVOT notch formation and the subsequent impact on cardiac function in healthy subjects remains unclear.MethodsA total of 99 subjects (69 males and 30 females) with a median age of 25 years were enrolled in this study; they traveled from 500 to 4100 m by bus over a 2-day period. All subjects underwent a comprehensive physiological and echocardiographic examination 1 day before ascension at low altitude and 15 ± 3 h after arrival at HA. The RVOT notch was determined by the presence of a notched shape in the RVOT Doppler flow velocity envelope. The systolic PAP (SPAP) was calculated as Bernoulli equation SPAP = 4 × (maximum tricuspid regurgitation velocity)2+5 and mean PAP (mPAP) = 0.61 × SPAP+2. Cardiac output was calculated as stroke volume × heart rate. Pulmonary capillary wedge pressure (PCWP) was calculated as 1.9+1.24 × mitral E/e’. Pulmonary vascular resistance (PVR) was calculated as (mPAP-PCWP)/CO.ResultsAfter HA exposure, 20 (20.2%) subjects had an RVOT notch [notch (+)], and 79 (79.8%) subjects did not have an RVOT notch [notch (−)]. In the multivariate logistic regression analysis, the SPAP, right ventricular global longitude strain (RV GLS), and tricuspid E/A were independently associated with the RVOT notch. The SPAP, mPAP, PVR, standard deviations of the times to peak systolic strain in the four mid-basal RV segments (RVSD4), peak velocity of the isovolumic contraction period (ICV), and the peak systolic velocity (s’) at the mitral/tricuspid annulus were increased in all subjects. Conversely, the pulse oxygen saturation (SpO2), RV GLS, and tricuspid annulus plane systolic excursion (TAPSE)/SPAP were decreased. However, the increases of SPAP, mPAP, PVR, and RVSD4 and the decreases of SpO2, RV GLS, and TAPSE/SPAP were more pronounced in the notch (+) group than in the notch (−) group. Additionally, increased tricuspid ICV and mitral/tricuspid s’ were found only in the notch (−) group.ConclusionHA exposure-induced RVOT notch formation is associated with impaired RV function, including no increase in the tricuspid ICV or s’, reduction of RV deformation, deterioration in RV-pulmonary artery coupling, and RV intraventricular synchrony.

scholarly journals Pseudoaneurisma Arteri Brakialis Pasca Kateterisasi Laporan Kasus

e-CliniC ◽  
2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Natalia Ch. Polii ◽  
Janry A. Pangemanan ◽  
Agnes L. Panda ◽  
Ira Posangi
Keyword(s):  
Brachial Artery ◽  
Colour Doppler ◽  
Ultrasound Guided ◽  
Compression Technique ◽  
Artery Pseudoaneurysm ◽  
Neck Size ◽  
Chief Complaints ◽  
Pulsed Wave Doppler ◽  
History Of ◽  
The Right

Abstract: Post-catheterization PSA occurs at the site of arterial puncture followed by incomplete hemostasis. We reported a 63-year-old male visited the emergency department of Prof Dr. R. D. Kandou Hospital with chief complaints of swelling and severe pain on the right arm, occured 6 days prior to the ER visit. His right arm looked darker and felt colder than the counterpart, felt numb, and was hard to move due to pain. Three months ago, the patient had a history of percutaneous transluminal coronary angiography through brachial artery access. Examination of the right upper extremity revealed hematoma at brachial artery puncture site, edema at 1/3 distal of the brachial region, cold acral areas, strong right brachial artery pulses, yet small radial ones. Vascular Doppler examination showed a superficial hematoma above the brachial artery and a PSA pouch of 1.23 x 1.67 cm with a small neck (<0.5 cm). Colour Doppler displayed a “yin and yang” flow at pouch, while pulsed-wave Doppler showed a “to and fro” wave through the neck. Patient was diagnosed as iatrogenic brachial artery pseudoaneurysm and managed with ultrasound-guided compression technique followed by continuous compression with elastic bandage. This technique was selected due to the PSA size less than 3 cm yet symptomatic, small neck size (<1 cm), and no size progression. Patient discharged after the PSA pouch and neck shrinked. On 6 months follow-up, neither neck nor pseudoaneurysm pouch were found.Keywords: pseudoaneurysm, ultrasound-guided compression Abstrak: PSA pasca kateterisasi terjadi pada arteri yang dipungsi tetapi tidak terjadi hemostasis sempurna. Kami melaporkan seorang laki-laki berusia 63 tahun datang di Instalasi Rawat Darurat Medik RSUP Prof. Dr. R. D. Kandou dengan keluhan utama bengkak dan nyeri hebat pada lengan kanan sejak 6 hari SMRS dan memberat pada satu hari terakhir. Tangan kanan tampak lebih gelap dibandingkan tangan kiri, teraba dingin, terasa kebas dan sulit digerakkan karena nyeri. Tiga bulan sebelumnya pasien dilakukan tindakan intervensi koroner perkutan. Pada pemeriksaan ekstremitas atas kanan tampak hematoma di daerah pungksi, edema setinggi 1/3 distal regio brachialis sampai ujung jari, akral teraba dingin, pulsasi arteri brakialis teraba kuat tetapi arteri radialis teraba kecil. Pemeriksaan Doppler vascular mendapatkan gambaran hematoma superfisial dari arteri brakialis dan tampak kantong PSA berukuran 1,23x1,67 cm dengan neck berukuran kecil (<0,5 cm) Pada colour Doppler didapatkan aliran pada kantong pseudoaneurisma seperti gambaran yin dan yang. Pada pulsed-wave Doppler di saluran PSA (neck) didapatkan gelombang “to and fro”. Berdasarkan anamnesis, pemeriksaan fisik dan penunjang pasien ini didiagnosis dengan PSA arteri brakialis iatrogenik (pasca kateterisasi). Penanganan dengan ultrasound-guided compression dan dilanjutkan dengan kompresi kontinu dengan bebat elastik. Pemilihan teknik kompresi ini berdasarkan pada ukuran kantong <3 cm namun bergejala, ukuran neck kecil <1cm serta tidak didapatkan pembesaran progresif. Pasien dipulangkan setelah kantong maupun neck PSA tampak mengecil, dan 6 bulan setelahnya tidak lagi terlihat neck maupun kantong PSA.Kata kunci: pseudoaneurisma, ultrasound-guided compression

Hamstring Flexibility Is Not Correlated with Isokinetic Knee Muscle Strength in Female Modern Dancers

2018 ◽  
Vol 33 (2) ◽  
pp. 95-101 ◽  
Author(s):  
Ani Agopyan
Keyword(s):  
Muscle Strength ◽  
Knee Extensor ◽  
Peak Torque ◽  
Flexor Muscle ◽  
Work Production ◽  
University Level ◽  
Modern Dancers ◽  
Hamstring Flexibility ◽  
Knee Muscle ◽  
The Right

OBJECTIVE: To evaluate bilateral isokinetic knee extensor and flexor muscle strength relative to hamstring flexibility in female modern dancers. METHODS: 20 trained university-level female modern dance students (mean age 23.8±3.8 yrs) volunteered for the study. Concentric isokinetic peak torque (PT, in Nm), peak torque % of body weight (PT%BW, in Nm/kg), and total work (TW, in J) of the knee extensor and flexor muscles for each leg were measured with a dynamometer at a velocity of 60, 180, and 300°/s. Hamstring flexibility of both limbs was assessed by a goniometer with the subjects in a supine position using the active straight leg raise (SLR) test. Participants were divided into flexible (n=10) and highly flexible (n=10) groups based on their hamstring flexibility. RESULTS: The flexible and highly flexible groups had significant differences (p≤0.05) for the right (flexible, 119.7±4.3°; highly flexible, 137.7±2.6°) and left active SLR tests (flexible, 120.6±5.3°; highly flexible, 138.3±4.5°). No significant differences were found between the flexible and highly flexible dancers for concentric knee extensor and flexor muscle strength in all selected parameters (p≤0.05). There were also no significant correlations between flexibility and bilateral PT, PT%BW, and TW scores (60, 180, and 300°/s) of dancers at the concentric contraction (p≤0.05). CONCLUSION: These findings indicate that hamstring flexibility (for both the flexible and highly flexible groups) is not correlated with knee strength and has no impact on torque and work production during maximal concentric isokinetic knee muscle action in university-level female modern dancers.

scholarly journals Suspected Gentamicin-Induced Retinal Vascular Occlusion after Vitrectomy

2020 ◽  
Vol 11 (2) ◽  
pp. 473-480 ◽  
Author(s):  
Fumiko Murao ◽  
Takamasa Kinoshita ◽  
Takashi Katome ◽  
Hiroki Sano ◽  
Masanori Niki ◽  
...  
Keyword(s):  
Vascular Occlusion ◽  
Perioperative Period ◽  
Retinal Hemorrhage ◽  
Optic Disk ◽  
Subconjunctival Injection ◽  
Ocular Surgery ◽  
Gas Tamponade ◽  
Retinal Vascular Occlusion ◽  
The Right ◽  
Arteries And Veins

Retinal vascular occlusion after ocular surgery is a rare but serious complication. A history of cardiovascular diseases, retrobulbar anesthesia injection, high intraocular pressure during the perioperative period, and drug toxicity have been reported as possible causative factors. We report here two cases of multiple retinal vascular occlusions after the subconjunctival injection of gentamicin at the end of uncomplicated 25-gauge vitrectomy. Case 1 was a 61-year-old man who developed a macular hole in the right eye. Phacovitrectomy with gas tamponade was performed. On postoperative day (POD) 1, dot hemorrhage was observed on the temporal side of the optic disk. On POD10, macular whitening, retinal hemorrhage, and multiple occlusion of retinal arteries and veins were observed. Case 2 was a 51-year-old woman who was diagnosed with rhegmatogenous retinal detachment in the right eye and underwent phacovitrectomy with gas tamponade. On POD3, macular whitening with cotton wool spots and retinal hemorrhage were observed with macular ischemia owing to occlusion of retinal arteries and veins. In both cases, subconjunctival injection of gentamicin given at the end of surgery was the most suspected cause of retinal vascular occlusion.

Hip flexor muscle size in ballet dancers compared to athletes, and relationship to hip pain

2019 ◽  
Vol 38 ◽  
pp. 146-151
Author(s):  
Sophie Emery ◽  
Jill Cook ◽  
April-Rose Ferris ◽  
Peter Smith ◽  
Susan Mayes
Keyword(s):  
Hip Pain ◽  
Muscle Size ◽  
Flexor Muscle ◽  
Ballet Dancers ◽  
Hip Flexor
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