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General Thermography
Published in James Stewart Campbell, M. Nathaniel Mead, Human Medical Thermography, 2023
James Stewart Campbell, M. Nathaniel Mead
The back of the neck consists of the occiput, cerebral vertebrae, and several thick muscular layers. The area is normally devoid of thermographically visible arteries or veins, but subdermal lymph nodes may be present. As described in Chapter 5, when upright or sitting, the posterior neck muscles are under constant tension to counter the forward rotation of the cranium on the cervical vertebrae. Chronic forward bending of the neck can put excessive strain on the posterior neck muscles, as can psychological tension and overuse of stimulants. If the subject has been properly cooled, with any long hair tied up off the neck area during the equilibration, thermography of the neck can detect this strain pattern as excess warmth over the upper portions of the trapezius muscles (Figure 10.49). Enthesiopathy of the trapezius insertion on the occipital bone can also be detected, in which case the inflammatory pattern may be limited to the junction where muscle attaches to bone.
Nonneurogenic Voiding Dysfunction and Urinary Retention
Published in Linda Cardozo, Staskin David, Textbook of Female Urology and Urogynecology - Two-Volume Set, 2017
5 seconds of the beginning of voiding. The mAximum flow rAte is generAlly 1.5–2 times the AverAge flow rAte. A low normAl (suboptimAl) flow trAce (Figure 53.6A) shows no symmetricAl peAk. MAximum flow rAte, somewhere between the 5th And 25th centile, occurs eArly, And then the flow trAils off. An AbdominAl strAin pAttern (Figure 53.6b)
Electrocardiographic Pattern of Left Ventricular Hypertrophy with Strain and Survival in Calcific Aortic Valve Disease
Published in Structural Heart, 2018
Edgard A. Prihadi, Melissa Leung, E. Mara Vollema, Arnold C. T. Ng, Nina Ajmone Marsan, Victoria Delgado, Jeroen J. Bax
Resting 12-lead ECG performed within a 12-month timeframe prior to or after the date of the echocardiography diagnosing aortic calcific valve disease were analyzed. ECG was calibrated at 0.1 mV/mm with a paper speed of 25 mm/s. Sinus rhythm and atrial fibrillation were defined according to current guidelines.9 In the lead with the greatest QRS width, QRS duration was measured in milliseconds (ms). According to current recommendations, LV hypertrophy pattern was defined as Sokolow-Lyon voltage (sum of SV1 and RV5/V6) ≥ 35 mV.2 In patients with LV hypertrophy on ECG, the presence of ECG strain pattern was evaluated. ECG strain pattern was defined as any downsloping convex ST segment with an inverted asymmetrical T-wave opposite to the QRS axis in leads V5 and/or V6 (Figure 1).2 The patient population was divided according to the presence of ECG-defined LV hypertrophy and strain pattern: patients without LV hypertrophy, patients with LV hypertrophy but without strain pattern and patients with LV hypertrophy with strain pattern.
A retrospective analysis of electrocardiographic abnormalities found in black South African patients with diabetes attending a regional hospital in KwaZulu-Natal
Published in Journal of Endocrinology, Metabolism and Diabetes of South Africa, 2018
A significant percentage of our patients with LVH had underlying hypertension (45%) while 40.1% of these patients with LVH had overt proteinuria. This is an expected finding as hypertension and proteinuria are commonly associated with LVH.40,46 Electrocardiographic evidence of LVH with repolarisation abnormality (LVH with strain pattern) is associated with an increased risk of heart failure.47 Our study found that 31 (4.9%) of the total number of patients had evidence of LVH with strain pattern. A significant percentage of patients with, versus those without, LVH had T-wave inversions in the anterior and lateral territories.
Assessment of stress/strain in dental implants and abutments of alternative materials compared to conventional titanium alloy—3D non-linear finite element analysis
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2020
Pedro Henrique Wentz Tretto, Mateus Bertolini Fernandes dos Santos, Aloisio Oro Spazzin, Gabriel Kalil Rocha Pereira, Atais Bacchi
It is suggested that the dissipation of the stresses generated by the occlusal loads at the bone/implant interface may play an important role for the success of dental implants. From the biomechanical point of view, the successful osseointegration of dental implants depends on the way mechanical stresses and strains are transferred to the surrounding bone tissue (Winter et al. 2013). Among the factors that affect the stress distribution and strain pattern, we can include the implant and abutment material (Chan et al. 2018) and their macrogeometry (Winter et al. 2013).