Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 336
Filtrar
Mais filtros

Tipo de documento
Intervalo de ano de publicação
1.
Nature ; 561(7721): 100-103, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30185954

RESUMO

Soil macroporosity affects field-scale water-cycle processes, such as infiltration, nutrient transport and runoff1,2, that are important for the development of successful global strategies that address challenges of food security, water scarcity, human health and loss of biodiversity3. Macropores-large pores that freely drain water under the influence of gravity-often represent less than 1 per cent of the soil volume, but can contribute more than 70 per cent of the total soil water infiltration4, which greatly magnifies their influence on the regional and global water cycle. Although climate influences the development of macropores through soil-forming processes, the extent and rate of such development and its effect on the water cycle are currently unknown. Here we show that drier climates induce the formation of greater soil macroporosity than do more humid ones, and that such climate-induced changes occur over shorter timescales than have previously been considered-probably years to decades. Furthermore, we find that changes in the effective porosity, a proxy for macroporosity, predicted from mean annual precipitation at the end of the century would result in changes in saturated soil hydraulic conductivity ranging from -55 to 34 per cent for five physiographic regions in the USA. Our results indicate that soil macroporosity may be altered rapidly in response to climate change and that associated continental-scale changes in soil hydraulic properties may set up unexplored feedbacks between climate and the land surface and thus intensify the water cycle.


Assuntos
Mudança Climática , Porosidade , Solo/química , Ciclo Hidrológico , Retroalimentação , Chuva , Estados Unidos
2.
J Clin Ultrasound ; 52(2): 178-185, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37997020

RESUMO

INTRODUCTION: The functioning of the left atrium (LA) is partly controlled by the neural system. It was purposed to evaluate correlations between the result of Ewing's 5 standard cardiovascular reflex tests (SCRTs) characterizing autonomic function and LA volumetric and functional features as assessed by three-dimensional speckle-tracking echocardiography (3DSTE) in healthy individuals. MATERIALS AND METHODS: The current study comprised 18 healthy volunteers being in sinus rhythm (mean age: 35 ± 12 years, 10 men). Measurement of blood pressure, ECG, 5 SCRTs, two-dimensional Doppler echocardiography and 3DSTE were performed. These parameters were in normal ranges in all cases. RESULTS: From LA volumetric parameters, only systolic total atrial emptying fraction (r = 0.559, p = 0.037) and early diastolic passive atrial emptying fraction (r = 0.539, p = 0.047) correlated with systolic blood pressure response to standing representing sympathetic autonomic function. From LA strains, peak mean segmental LA radial strain (RS) (r = -0.532, p = 0.050), global and mean segmental LA circumferential strain (CS) (r = 0.662, p = 0.010 and r = 0.635, p = 0.015, respectively) representing systolic LA function correlated with Valsalva ratio representing parasympathetic autonomic function. Global LA-RS (r = -0.713, p = 0.040) and LA-CS (r = 0.657, p = 0.011) and mean segmental LA-CS (r = 0.723, p = 0.003) at atrial contraction representing end-diastolic atrial contraction showed correlations with Valsalva ratio, as well. Peak global and mean segmental LA-CS (r = 0.532, p = 0.050 and r = 0.530, p = 0.050) and the same strains at atrial contraction (r = 0.704, p = 0.005 and r = 0.690, p = 0.006) representing systolic function and end-diastolic atrial contraction correlated with systolic blood pressure response to standing representing both parasympathetic and sympathetic autonomic functions. CONCLUSIONS: Significant correlations between features of vegetative autonomic function represented by Ewing's 5 SCRTs and specific LA functions represented by 3DSTE-derived LA volume-based functional properties and strains could be demonstrated in healthy adults.


Assuntos
Função do Átrio Esquerdo , Ecocardiografia Tridimensional , Adulto , Masculino , Humanos , Adulto Jovem , Pessoa de Meia-Idade , Função do Átrio Esquerdo/fisiologia , Ecocardiografia Tridimensional/métodos , Ecocardiografia , Átrios do Coração/diagnóstico por imagem , Ecocardiografia Doppler/métodos
3.
J Clin Ultrasound ; 52(5): 600-607, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38581157

RESUMO

INTRODUCTION: Similarly to the ventricles, the atria are under sympathetic/parasympathetic neural regulation. Accordingly, correlations were investigated between Ewing's standard cardiovascular reflex tests (SCRTs) and three-dimensional speckle-tracking echocardiography (3DSTE)-derived right atrial (RA) volumes and strains in healthy subjects. MATERIALS AND METHODS: The study comprised 45 healthy adults, but 5 subjects were excluded due to inferior image quality for 3DSTE-derived RA assessments. The remaining 40 individuals being in sinus rhythm had a mean age of 35.1 ± 3.5 years (20 men). Two-dimensional, Doppler, 3DSTE and SCRTs were performed in all cases. RESULTS: RA maximum volume and total and passive RA stroke volumes correlated with the Valsalva ratio. Active RA stroke volume and emptying fraction showed correlations with 30/15 ratio. Peak global and mean segmental RA circumferential (CS) and longitudinal strains (LS) showed correlation with the Valsalva ratio. At atrial contraction, global RA-LS and mean segmental RA-CS showed correlations with the Valsalva ratio. Moreover, mean segmental RA-CS correlated with 30/15 ratio and mean segmental RA radial strain showed correlations with systolic blood pressure in response to standing. Autonomic neuropathy score correlated with peak global RA-LS. CONCLUSIONS: Autonomic function parameters have significant associations with specific RA functions in healthy adults, making the latter possible indicators of autonomic dysregulation.


Assuntos
Função do Átrio Direito , Ecocardiografia Tridimensional , Átrios do Coração , Humanos , Ecocardiografia Tridimensional/métodos , Masculino , Feminino , Adulto , Átrios do Coração/diagnóstico por imagem , Átrios do Coração/fisiopatologia , Função do Átrio Direito/fisiologia , Sistema Nervoso Autônomo/diagnóstico por imagem , Sistema Nervoso Autônomo/fisiopatologia , Valores de Referência , Voluntários Saudáveis
4.
J Clin Ultrasound ; 51(6): 952-959, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36840337

RESUMO

INTRODUCTION: Systemic amyloidosis is an uncommon disorder in which amyloid fibrils deposit extracellularly. Three-dimensional speckle-tracking echocardiography (3DSTE) is a novel method able to assess left ventricular (LV) global longitudinal strain (GLS). Our aim was to evaluate the prognostic impact of 3DSTE-derived LV-GLS in patients with cardiac amyloidosis (CA). MATERIALS AND METHODS: A total of 35 patients suffering from light-chain (AL) CA or transthyretin (TTR) CA were selected, but 7 patients had to be excluded due to insufficient image quality or were lost for follow-up. With AL-CA 23 cases, while for TTR-CA 5 patients were diagnosed. Complete two-dimensional Doppler and 3DSTE were performed in all subjects. RESULTS: The median follow-up was 201 days (ranging from 36 to 632 days) during which cardiovascular event was detected in 17 CA patients, including 8 cardiac deaths. Six patients were diagnosed with acute heart failure, two patients needed invasive interventions (percutaneous coronary intervention with stent-implantation, implantable cardioverter defibrillator implantation) and in one patient new higher grade atrioventricular block was registered. Using ROC analysis, 3DSTE-derived LV-GLS ≥11.8% (absolute value) was found to be a significant predictor for cardiovascular event-free survival (sensitivity 65%, specificity 64%, area under the curve 0.71, p = .05). Lower LV ejection fraction was confirmed in patients with LV-GLS <11.8% as compared to cases with LV-GLS ≥11.8%. In case of a cardiovascular event, LV-GLS was lower as compared to that of subjects with no events. Multivariable regression analysis confirmed that LV-GLS and LV end-diastolic diameter were independent predictors of cardiovascular survival. CONCLUSION: 3DSTE-derived LV-GLS is an independent predictor for future cardiovascular events in CA patients.


Assuntos
Amiloidose , Amiloidose de Cadeia Leve de Imunoglobulina , Disfunção Ventricular Esquerda , Humanos , Prognóstico , Deformação Longitudinal Global , Ecocardiografia/métodos , Amiloidose/complicações , Amiloidose/diagnóstico por imagem , Função Ventricular Esquerda , Disfunção Ventricular Esquerda/diagnóstico por imagem
5.
Medicina (Kaunas) ; 59(12)2023 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-38138154

RESUMO

Background and Objectives: It would be important to know what happens to the volume and volume-based functional properties of one atrium if the size of the other atrium is larger or smaller than the average. Therefore, the present study aimed to perform three-dimensional speckle-tracking echocardiography (3DSTE)-derived quantification of left atrial (LA) and right atrial (RA) volumes and volume-based functional properties to examine these associations in healthy adults with mean and lower or higher than mean atrial volumes. Materials and Methods: The present study consisted of 179 healthy volunteers with a mean age of 32.3 ± 12.3 years (92 males). Three-dimensional speckle-tracking echocardiography-derived LA and RA volumes and volume-based functional properties were determined in all cases. Results: When different LA or RA volume groups were evaluated, both LA and RA showed the same pattern of volume changes in all phases of atrial function with higher LA or RA volumes. In case of low and mean LA volumes, RA volumes were higher compared to their LA counterpart. In case of mean and high RA volumes, RA volumes proved to be higher as well. In case of mean LA or RA volumes, differences between LA and RA stroke volumes (SVs) could not be detected, but all atrial emptying fractions (EFs) were lower for RA than for LA. Some differences were detected in counterpart LA/RA total, passive, and active atrial SVs and EFs values in the presence of lower/higher than mean LA/RA volume. Conclusions: In case of mean LA or RA volumes, RA volumes are higher compared to their LA counterpart, LA-SVs and RA-SVs are similar, but atrial EFs are lower for RA than for LA. If lower/higher than mean LA or RA volumes are present, some differences in patterns of changes in counterpart atrial volumes-SVs and EFs-could be detected.


Assuntos
Apêndice Atrial , Ecocardiografia Tridimensional , Adulto , Masculino , Humanos , Adulto Jovem , Ecocardiografia Tridimensional/métodos , Átrios do Coração/diagnóstico por imagem , Ecocardiografia/métodos , Função Atrial
6.
Rev Cardiovasc Med ; 23(1): 5, 2022 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-35092197

RESUMO

Left ventricular (LV) twist is defined as the wringing motion of the LV around its long-axis during systole generated by rotation of the LV apex in a counterclockwise direction, as viewed from the apex, while the LV base moves in a clockwise direction. In several cases, the LV apex and base move in the same direction during ejection demonstrating a special condition called as LV 'rigid body rotation'. The present review aimed to summarize our knowledge about this rare but not fully understood entity demonstrating its theoretic pathophysiologic background, clinical significance, associated diseases, and reversibility based on available literature.


Assuntos
Ecocardiografia Tridimensional , Ventrículos do Coração/diagnóstico por imagem , Humanos , Prevalência , Função Ventricular Esquerda
7.
Postepy Dermatol Alergol ; 39(3): 580-586, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35950131

RESUMO

Introduction: Lipoedema is a chronic feminine disease with disproportional painful fat deposition of the lower body half and occassional arm affection. Aim: The objective of the present study was to assess LA volumetric and functional properties by three-dimensional speckle-tracking echocardiography (3DSTE) in patients with lipoedema and to compare their results to age- and gender-matched healthy controls. It was also aimed to examine whether one-hour use of medical compression stockings (MCS) has any effect on LA volumes and functional properties. Material and methods: The study comprised 25 female patients with stage 2 lipoedema (mean age: 42.5 ±12.2 years). Their results were compared to those of the control group consisting of 54 age- and gender-matched healthy female subjects (mean age: 42.7 ±10.6 years) without classic risk factors. Results: Increased LA volumes could be measured in lipoedema patients as compared to controls regardless of the phase of the cardiac cycle it was measured in, and the LA volumes showed further increase after 1-hour use of MCS. Similarly, LA total and active stroke volumes and LA passive emptying fraction were increased in lipoedema patients, and these parameters were further increased in systole and early-diastole. Peak global radial and 3D strains were increased in lipoedema patients. Peak global longitudinal strain increased in lipoedema patients after one-hour use of MCS compared to data measured at rest. Conclusions: Lipoedema is associated with increased LA volumes and changes in LA functional properties. The use of MCS further increases some of the LA volumetric parameters.

8.
J Clin Ultrasound ; 49(7): 650-658, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-33846987

RESUMO

INTRODUCTION: Little is known about the relationship between left atrium (LA) volumes and contractility features along the cardiac cycle. The present study aimed to assess, by three-dimensional speckle-tracking echocardiography (3DSTE), correlations between LA volumes, volume-based functional properties, and strains during the cardiac cycle in healthy adults. METHODS: We included 217 healthy adult volunteers (mean age 33.4 ± 12.7 years, 112 males) who underwent complete two-dimensional Doppler echocardiography with 3DSTE. RESULTS: LA stroke volumes were greater in subjects with the greater maximum LA volume (Vmax ) in reservoir, conduit, and booster pump phases of LA function. While LA emptying fraction in LA reservoir phase was not different between subjects depending in their Vmax value, a significantly lower LA emptying fraction could be detected in LA conduit phase in subjects whose Vmax was >50 mL. In booster pump function, LA emptying fraction was not significantly different whatever the Vmax . Only global and mean segmental peak LA radial strain (RS) and 3D strain (3DS) and the same strains at atrial contraction appeared greater in subjects with greater Vmax , whereas the other strain parameters were not different. CONCLUSIONS: In healthy subjects, LA-RS and LA-3DS, objective features of LA contractility, are greater in subjects with greater LA volumes up to a point beyond which this association disappears.


Assuntos
Ecocardiografia Tridimensional , Adulto , Função do Átrio Esquerdo , Ecocardiografia , Ecocardiografia Doppler , Átrios do Coração/diagnóstico por imagem , Humanos , Masculino
9.
J Clin Ultrasound ; 49(1): 49-55, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32804419

RESUMO

INTRODUCTION: The present study was designed to define normal reference values of three-dimensional speckle-tracking echocardiography (3DSTE)-derived left atrial (LA) volumes, stroke volumes (SVs), and emptying fractions (EFs) with regard to the cardiac cycle. METHODS: The present study involved 256 healthy adult subjects in sinus rhythm who underwent complete two-dimensional Doppler echocardiography and 3DSTE at the same time. However, due to inferior image quality, 87 subjects have been excluded. The remaining population sample comprised of 169 patients who gave informed consent to participate in the study. RESULTS: While systolic maximum LA volume and early diastolic preatrial contraction LA volume did not change over age decades, late-diastolic minimum LA volume decreased and was lowest in subjects aged 40 to 49 years then increased after 50 years. Total atrial EF increased over age decades with a reduction after 50 years. Passive atrial EF showed a significant continuous increase over age decades. Active atrial EF did not change in younger ages and was the highest between ages 40 and 49 years with a significant impairment after 50 years. CONCLUSIONS: This study shows the age- and gender-dependency of normal values of 3DSTE-derived LA volumes, stroke volumes, and emptying fractions with regard to the cardiac cycle in healthy adult subjects.


Assuntos
Função do Átrio Esquerdo/fisiologia , Ecocardiografia Doppler/métodos , Átrios do Coração/diagnóstico por imagem , Volume Sistólico/fisiologia , Adolescente , Adulto , Feminino , Voluntários Saudáveis , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Adulto Jovem
10.
J Clin Ultrasound ; 49(3): 234-239, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32808360

RESUMO

INTRODUCTION: There is a limited number of echocardiographic studies determining mitral annular (MA) dimensions in healthy subjects. The present study aimed to establish normal reference values of three-dimensional speckle-tracking echocardiography-derived MA dimensions and functional properties in healthy adults in relation with age and gender. METHODS: The present study comprised 298 healthy adult subjects. From this population, 94 subjects were excluded due to inadequate image quality. Therefore the remaining group consisted of 204 subjects with the mean age of 33.88 ± 12.97 years (107 males). The population sample was further divided into age categories: 18-29 years (n = 105; mean age: 24.11 ± 2.98 years, 51 males), 30-39 years (n = 44; mean age: 33.80 ± 2.39 years, 31 males), 40-49 years (n = 19; mean age: 43.47 ± 3.18 years, 11 males) and ≥50 years of age (n = 36, mean age: 57.42 ± 6.11 years, 14 males). RESULTS: End-diastolic MA dimensions did not change significantly during the decades. End-systolic MA diameter, area, and perimeter were larger over the age of 50 years than in the 18-29 year-old group. MA fractional area change was found smaller over the age of 50 years than in 18-29-year-old group. While end-diastolic MA variables did not show gender-differences, end-systolic MA area and perimeter were lower in females in the 18-29-year-old group. CONCLUSIONS: End-systolic MA dimensions change over decades, resulting in a special pattern of MA functional properties with significant reduction over the age of 50 years.


Assuntos
Ecocardiografia Tridimensional/normas , Voluntários Saudáveis , Valva Mitral/diagnóstico por imagem , Adolescente , Adulto , Diástole/fisiologia , Feminino , Átrios do Coração/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Valores de Referência , Adulto Jovem
11.
J Clin Ultrasound ; 49(4): 368-377, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33185300

RESUMO

INTRODUCTION: A number of studies defined normal reference values of three-dimensional (3D) speckle-tracking echocardiography (3DSTE)-derived left ventricular (LV) strains. The present study aimed to quantify normal reference values of LV strains in healthy adult population in real clinical world settings in different age groups, and to determine age- and gender-dependence of these variables in a high volume single center. METHODS: The present prospective study included 296 healthy adult subjects. Among them, 124 were excluded due to inferior image quality during the 6-year recruitment period (2011-2017). The remaining population was further divided into four subgroups based on age decades. RESULTS: While global radial (RS) strain showed an increase-decrease-increase pattern with age, circumferential, longitudinal, and area strains (CS, LS, AS, respectively) were nonsignificantly lower in older ages. Only global LV-LS showed gender-dependency with higher values in females. Although moderately higher RS and 3DS and lower LS, and AS were observed in males, clear gender-dependency could not be detected in different age decades. CONCLUSIONS: This study provides normal reference values of 3DSTE-derived global, segmental, mean segmental, and regional LV strains in healthy adult subjects based on real-life clinical experience. Age-, gender-, and functional nonuniformity of LV strains were also defined.


Assuntos
Ecocardiografia Tridimensional/métodos , Coração/fisiologia , Adulto , Feminino , Ventrículos do Coração/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Valores de Referência , Função Ventricular Esquerda/fisiologia
12.
J Strength Cond Res ; 35(1): 275-279, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-29927896

RESUMO

ABSTRACT: Szolnoky, G, Gavallér, H, Gönczy, A, Bihari, I, Kemény, L, Forster, T, and Nemes, A. The effects of below-knee medical compression stockings on pulse wave velocity of young healthy volunteers. J Strength Cond Res 35(1): 275-279, 2021-The effects of graduated medical compression stockings (MCS) on cardiovascular responses are poorly investigated. A simple study was undertaken to investigate whether the application of below-knee leg MCSs with different pressures could influence aortic pulse wave velocity (PWV) as the gold standard for aortic stiffness measurement evaluated by arteriography. Ten volunteers underwent PWV measurement at baseline, then in below-knee compression class (ccl) 1 (18-21 mm Hg), 2 (23-32 mm Hg) and 3 (34-46 mm Hg) MCSs in a consecutive manner. Baseline PWV (mean value: 7.86 ± 1.70 m·s-1) was significantly reduced by ccl 1 MCSs (mean value: 6.55 ± 0.88 m·s-1, p = 0.04). ccl 2 and ccl 3 stockings also notably decreased baseline PWV (mean values: 6.63 ± 0.65 m·s-1, p = 0.058 and 6.62 ± 1.00 m·s-1, p = 0.067; respectively). The application of low compression MCSs (ccl 1) leads to a significant decrease in PWV indicating a beneficial cardiovascular influence.


Assuntos
Análise de Onda de Pulso , Rigidez Vascular , Aorta , Voluntários Saudáveis , Humanos , Meias de Compressão
13.
J Clin Ultrasound ; 48(5): 263-268, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31737908

RESUMO

INTRODUCTION: The right atrium (RA) roles include being a systolic reservoir, an early diastolic conduit, and a late-diastolic booster pump. The present study aimed to assess normal reference values of three-dimensional speckle-tracking echocardiography (3DSTE)-derived RA volumetric data and volume-based functional properties in healthy adult subjects. METHODS: We included 260 healthy adult subjects in sinus rhythm with complete clinical and demographic dataset, but excluded 110 of them because of inferior image quality. The remaining population sample comprised 150 subjects (31.0 ± 11.6 years, 79 males). Complete two-dimensional Doppler echocardiography and 3DSTE have been performed in all subjects. RESULTS: Systolic RA volumetric variables did not show changes over time, but after 50 years, a significant reduction could be demonstrated in RA stroke volume and emptying fraction. While early diastolic RA volume increased over time, RA stroke volume and emptying fraction decreased. While late-diastolic RA volume increased over age decades, similar increase could be detected in RA stroke volume but a reduction occurred in older ages. Late-diastolic RA emptying fraction showed an increasing (after the 40s)-decreasing (after the 50s) pattern. CONCLUSIONS: Our study provides normal reference values of 3DSTE-derived RA volumes and volume-based functional properties and their age- and gender dependency in healthy adult subjects.


Assuntos
Função do Átrio Direito/fisiologia , Função Atrial/fisiologia , Ecocardiografia Tridimensional/métodos , Adolescente , Adulto , Feminino , Voluntários Saudáveis , Átrios do Coração/diagnóstico por imagem , Humanos , Masculino , Valores de Referência , Adulto Jovem
14.
J Clin Ultrasound ; 48(8): 470-475, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32394509

RESUMO

PURPOSE: Lipedema is a chronic, common but underdiagnosed disease masquerading obesity, with female predominance, characterized by disproportional abnormal adipose tissue distribution of the lower and also upper extremities. The present study was designed to determine whether lipedema is associated with three-dimensional (3D) speckle-tracking echocardiography (3DSTE)-derived left ventricular (LV) deformation abnormalities, and to assess the effects of 1-hour use of medical compression stockings (MCS). METHODS: The present study comprised 19 female patients with lipedema (mean age: 42.2 ± 12.4 years), compared to 28 age-matched healthy female controls (mean age: 42.0 ± 9.8 years). RESULTS: Lipedema patients showed larger left atrial and LV dimensions and greater LV ejection fraction than controls, without significant difference in other echocardiography variables. Lipedema patients had greater 3DSTE-derived global and mean segmental LV circumferential and area strains than controls. Following 1-hour use of wearing MCS, neither global and nor mean segmental LV strains showed significant impairment or improvement. CONCLUSIONS: Increased LV strains could be compensatory effects maintaining LV pumping function in lipedema. Short-term wearing of MCS has no global effect on LV strains.


Assuntos
Coração/fisiopatologia , Lipedema/fisiopatologia , Adulto , Ecocardiografia/métodos , Ecocardiografia Tridimensional/métodos , Feminino , Coração/diagnóstico por imagem , Átrios do Coração/diagnóstico por imagem , Ventrículos do Coração/diagnóstico por imagem , Humanos , Lipedema/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Disfunção Ventricular Esquerda/diagnóstico por imagem , Disfunção Ventricular Esquerda/fisiopatologia
15.
Echocardiography ; 36(4): 714-721, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30801756

RESUMO

INTRODUCTION: Left ventricular (LV) rotation and twist are essential parts of LV function. Three-dimensional speckle tracking echocardiography (3DSTE) is a relatively new method and is useful for the quantification of LV wall deformation and rotational parameters. The aim of the present study was to examine LV rotation and twist differences between different age-groups and genders in a healthy population. METHODS: The present study is comprised of 297 healthy adults; 120 adults have been excluded due to inferior image quality. The population was further divided into 4 subgroups based on age decades. RESULTS: Only the LV twist of all patients (13.5 ± 3.7 degree vs 15.6 ± 4.9 degree, P = 0.02) and the LV twist of females (13.0 ± 3.6 degree vs 15.5 ± 5.6 degree, P = 0.03) differed significantly between the age-group of 18-29 years and 50+ years. LV basal and apical rotation were not significantly different between the age-groups; however, they tendentiously increased with aging. No significant differences could be demonstrated regarding LV rotational and twist parameters between genders in any group. A phenomenon called LV rigid body rotation (LV-RBR)-where the base and apex of the LV rotate in the same direction-was present in 10 cases. CONCLUSIONS: Three-dimensional speckle tracking echocardiography seems to be a reasonably viable tool for the quantification of LV rotation and twist. Both LV basal and apical rotation and LV twist increase with aging, regardless of gender. LV-RBR is also present in the normal population.


Assuntos
Ecocardiografia Tridimensional/métodos , Função Ventricular Esquerda/fisiologia , Adulto , Feminino , Ventrículos do Coração/diagnóstico por imagem , Humanos , Masculino , Valores de Referência
16.
Echocardiography ; 36(11): 2064-2069, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31693238

RESUMO

INTRODUCTION: Hypereosinophilic syndrome (HES) is a very heterogeneous group of disorders with varied etiologies characterized by peripheral eosinophilia and eosinophilic tissue/end-organ damage. Three-dimensional speckle-tracking echocardiography (3DSTE) was used for assessment of left ventricular (LV) rotational mechanics in HES patients. METHODS: The study comprised 13 HES patients, from which one patient was excluded due to insufficient image quality. The remaining patient population consisted of 12 HES cases (mean age: 59.7 ± 13.7 years, eight males). The control group consisted of 36 healthy volunteers (mean age: 52.9 ± 8.3 years, 23 males). 3DSTE was used for the evaluation of LV rotational abnormalities. RESULTS: Both LV apical rotation (4.86 ± 1.92 degree vs 10.07 ± 3.92 degree, P < .0001) and LV twist (8.52 ± 2.79 degree vs 14.41 ± 4.26 degree, P < .0001) showed significant deteriorations in most of HES patients. Time-to-peak LV apical rotation (380 ± 115 ms vs 344 ± 69 ms, P = .56), LV basal rotation (335 ± 148 ms vs 337 ± 111 ms, P = .89), and LV twist (348 ± 91 ms vs 320 ± 60 ms, P = .64) were not significantly different between HES patients and controls. No correlations could be detected between absolute eosinophil count and eosinophil ratio and apical LV rotation (r = 0.12, P = .51 and r = 0.23, P = .45, respectively) and LV twist (r = 0.24, P = .39 and r = 0.31, P = .34, respectively). In two subjects, the absence of LV twist called LV "rigid body rotation" (RBR) was detected. CONCLUSIONS: Reduced LV apical rotation and twist could be demonstrated in HES. LV-RBR could be detected in some HES patients.


Assuntos
Ecocardiografia Doppler/métodos , Ecocardiografia Tridimensional/métodos , Ventrículos do Coração/diagnóstico por imagem , Síndrome Hipereosinofílica/complicações , Disfunção Ventricular Esquerda/diagnóstico , Função Ventricular Esquerda/fisiologia , Feminino , Seguimentos , Ventrículos do Coração/fisiopatologia , Humanos , Síndrome Hipereosinofílica/diagnóstico , Síndrome Hipereosinofílica/fisiopatologia , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Disfunção Ventricular Esquerda/etiologia , Disfunção Ventricular Esquerda/fisiopatologia
17.
Echocardiography ; 36(8): 1482-1491, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31318091

RESUMO

INTRODUCTION: Lipedema is a barely recognized and poorly diagnosed, but common disease affecting almost exclusively female patients. The pathomechanism of lipedema is not known, and clinically, it is a bilateral, symmetrical, disproportional fatty enlargement of the lower half of the body, the disease does not affect the feet, and the upper extremities are often involved. Since lipedema is associated with increased aortic stiffness and altered left ventricular (LV) rotational mechanics, the present study was designed to compare the size and function of the mitral annulus (MA) between lipedema patients and controls by three-dimensional speckle-tracking echocardiography (3DSTE). METHODS: Twenty-four patients with stage 2 lipedema and 48 age-, gender-, and body mass index-matched healthy control patients were included in the study. Each person from the lipedema and the control groups underwent two-dimensional Doppler echocardiography and 3DSTE. RESULTS: Significantly enlarged left atrial diameter, LV end-diastolic diameter and volume, and LV end-systolic volume could be detected in lipedema patients as compared to controls. None of the lipedema patients and controls showed ≥grade 1 mitral or tricuspid regurgitation. Dilated end-systolic and end-diastolic MA diameter, area, and perimeter could be demonstrated in lipedema patients as compared to controls, and these changes were accompanied by impaired MA fractional area change at rest. Following 1-hour use of compression stockings, no significant improvement was seen in these parameters. CONCLUSIONS: Lipedema is associated with MA enlargement and functional impairment. The use of compression stockings does not improve these alterations.


Assuntos
Ecocardiografia Doppler/métodos , Ecocardiografia Tridimensional/métodos , Ventrículos do Coração/diagnóstico por imagem , Lipedema/diagnóstico , Valva Mitral/diagnóstico por imagem , Função Ventricular Esquerda/fisiologia , Adulto , Diástole , Feminino , Átrios do Coração/diagnóstico por imagem , Ventrículos do Coração/fisiopatologia , Humanos , Lipedema/fisiopatologia , Masculino
18.
Echocardiography ; 35(7): 975-984, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29569265

RESUMO

INTRODUCTION: Acromegaly is a chronic and disfiguring hormonal disease caused by a benign growth hormone-secreting pituitary adenoma in most of the cases. The objective of this study was to investigate three-dimensional (3D) speckle tracking echocardiography (3DSTE)-derived left atrial (LA) volumetric and functional properties in patients with acromegaly. It was also examined whether the activity of acromegaly is associated with further alterations in these LA parameters. METHODS: A total of 23 patients with acromegaly were involved in this study. Due to inadequate image quality, 4 patients were excluded from the 3DSTE analysis. The mean age of the remaining acromegalic subjects was 58.5 ± 13.1 years (7 males). The control group consisted of 21 age- and gender-matched healthy subjects (mean age 51.8 ± 10.3 years, 10 males). RESULTS: Maximum (44.8 ± 12.7 mL vs 78.7 ± 25.4 mL, P < .05), minimum (24.1 ± 9.0 mL vs 44.5 ± 15.5 mL, P < .05), and preatrial contraction (35.5 ± 11.2 mL vs 66.0 ± 22.8 mL, P < .05) LA volumes were significantly different between all acromegaly patients compared with controls. Increased peak global and mean segmental radial and 3D strains and decreased LA circumferential strain (CS) could be detected in all acromegaly patients as compared to healthy subjects. Significant correlation could be detected between insulin-like growth factor 1 (IGF-1) index and peak superior LA-CS (r = .49, P = .05) in acromegaly. CONCLUSION: Acromegaly is associated with increased LA volumes and changes in LA functional properties.


Assuntos
Acromegalia/diagnóstico , Função do Átrio Esquerdo/fisiologia , Cardiomiopatias/diagnóstico , Ecocardiografia Doppler/métodos , Ecocardiografia Tridimensional/métodos , Átrios do Coração/diagnóstico por imagem , Contração Miocárdica/fisiologia , Acromegalia/complicações , Cardiomiopatias/etiologia , Cardiomiopatias/fisiopatologia , Feminino , Átrios do Coração/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade
19.
Echocardiography ; 35(2): 267-271, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29349900

RESUMO

Cardiac angiosarcomas are the most common primary malignant cardiac tumors in adults. The diagnosis is often delayed due to nonspecific clinical symptoms at presentation. The cornerstones of diagnosis are echocardiography and the histological evaluation of the cardiac biopsy. The knowledge on the treatment is limited; the outcomes of chemotherapy, radiotherapy, complete surgical removal, and heart transplantation are controversial. We report a 38-year-old woman with a primary heart tumor which infiltrated the right atrial wall and the pericardium and caused pericardial effusion. Angiosarcoma was verified histologically. The surgical excision could not be radical, and the patient died 3 months from diagnosis.


Assuntos
Ecocardiografia/métodos , Neoplasias Cardíacas/diagnóstico por imagem , Hemangiossarcoma/diagnóstico por imagem , Adulto , Procedimentos Cirúrgicos Cardíacos , Diagnóstico Diferencial , Ecocardiografia Transesofagiana , Evolução Fatal , Feminino , Coração/diagnóstico por imagem , Neoplasias Cardíacas/cirurgia , Hemangiossarcoma/cirurgia , Humanos , Imageamento por Ressonância Magnética
20.
J Clin Ultrasound ; 46(2): 152-156, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28493475

RESUMO

A patient with previous coronary stenting presented with stable angina and positive exercise treadmill test. Echocardiography with three-dimensional speckle-tracking demonstrated left ventricular rigid body rotation (near absence of left ventricular twist), whose characteristics changed dramatically during dipyridamole-induced vasodilatation. © 2017 Wiley Periodicals, Inc. J Clin Ultrasound 46:152-156, 2018.


Assuntos
Ecocardiografia Tridimensional/métodos , Ventrículos do Coração/diagnóstico por imagem , Ventrículos do Coração/fisiopatologia , Vasodilatação , Disfunção Ventricular Esquerda/diagnóstico por imagem , Disfunção Ventricular Esquerda/fisiopatologia , Dipiridamol , Humanos , Masculino , Pessoa de Meia-Idade , Rotação
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA