ABSTRACT
BACKGROUND: Cardiac magnetic resonance (CMR) was recently reported to predict mean pulmonary capillary wedge pressure (PCWP). However, there is a paucity of data on its accuracy for estimation of PCWP in patients with normal left ventricular (LV) ejection fraction (EF). We sought to examine its accuracy against the invasive gold standard and to compare it with the accuracy of comprehensive echocardiography. METHODS: Stable patients with EF of ≥50% who underwent right heart catheterization, CMR, and echocardiographic imaging within 1 week were included. Pulmonary capillary wedge pressure was estimated by CMR using a previously validated equation where PCWP is estimated based on the left atrial maximum volume and LV mass. Echocardiographic estimation of PCWP was based on 2016 American Society of Echocardiography/European Association of Cardiovascular Imaging guidelines, taking into account the presence of myocardial disease. RESULTS: The mean age of the 79 patients was 55 ± 15 years, and 58.2% were female. There were 33 patients with PCWP >15 mm Hg by right heart catheterization. Cardiac magnetic resonance prediction of PCWP had an area under the curve (AUC) = 0.72. In comparison, echocardiographic prediction of PCWP showed a higher accuracy (AUC = 0.87 vs AUC = 0.72; P = .008). CONCLUSIONS: In patients with normal LV EF, CMR estimation of mean PCWP based on LV mass and left atrial volume has modest accuracy for detecting patients with mean PCWP >15 mm Hg. Comprehensive echocardiography predicts elevated PCWP with higher accuracy in comparison with CMR.
Subject(s)
Echocardiography , Magnetic Resonance Imaging, Cine , Pulmonary Wedge Pressure , Stroke Volume , Ventricular Function, Left , Humans , Female , Male , Stroke Volume/physiology , Middle Aged , Pulmonary Wedge Pressure/physiology , Magnetic Resonance Imaging, Cine/methods , Echocardiography/methods , Ventricular Function, Left/physiology , Cardiac Catheterization/methods , Predictive Value of Tests , Reproducibility of Results , Retrospective Studies , Heart Ventricles/diagnostic imaging , Heart Ventricles/physiopathology , AgedABSTRACT
Agricultural soil salinization, which is often combined with heavy-metal contamination, is an ever-growing problem in the current era of global change. Legumes have a high potential for nitrogen fixation and are ideal crops for the reclamation of degraded soils. Alfalfa (Medicago sativa) is a valuable forage crop cultivated worldwide. Alfalfa plants fertilized with nitrogen or inoculated with a salt- and cadmium-tolerant Sinorhizobium meliloti strain were subjected to combined NaCl and CdCl2 stresses. Our results showed that inoculated plants presented higher aerial biomass than nitrogen-fertilized plants when they were exposed to salinity and cadmium together. To assess the mechanisms involved in the plant response to the combined stresses, superoxide dismutase and catalase antioxidant enzymatic activities were determined. Both increased upon stress; however, the increase in catalase activity was significantly less marked for inoculated plants, suggesting that other tolerance mechanisms might be active. Cd accumulation was lower in inoculated plants than in fertilized plants, which appears to imply that inoculation somehow prevented cadmium uptake by the plant roots. Expression analyses of several involved genes suggested that inoculation stimulated the biosynthesis of proline, phytochelatins, and homophytochelatins, together indicating that inoculated plants might be better suited to withstand combined salinity and cadmium stress effects.
ABSTRACT
Nodule endophytes and associated bacteria are non-symbiotic bacteria that colonize legume nodules. They accompany nodulating rhizobia and can form beneficial associations, as some of them are plant growth-promoting rhizobacteria (PGPR) that are able to promote germination and plant growth and increase tolerance to biotic and abiotic stress. White lupin (Lupinus albus) is a legume crop that is gaining relevance as a suitable alternative to soybean as a plant protein source. Eleven nodule-associated bacteria were isolated from white lupin nodules grown in a Tunisian soil. They belonged to the genera Rhizobium, Ensifer, Pseudomonas and Bacillus. Their plant growth-promoting (PGP) and enzymatic activities were tested in vitro. Strains Pseudomonas sp., L1 and L12, displayed most PGP activities tested, and were selected for in planta assays. Inoculation with strains L1 or L12 increased seed germination and had the same positive effects on all plant growth parameters as did inoculation with symbiotic Bradyrhizobium canariense, with no significant differences among treatments. Inoculation with efficient nitrogen-fixing rhizobia must compete with rhizobia present in the soil that sometimes nodulate efficiently but fix nitrogen poorly, leading to a low response to inoculation. In such cases, inoculation with highly effective PGPR might represent a feasible alternative to boost crop productivity.
ABSTRACT
Tandas, the Mexican variation of lending circles, are an informal financial practice used among Mexican American communities. Tandas are an important asset in families' resource management strategies, yet the practice is largely unrecognized in the resource management literature and devalued by traditional financial institutions. A qualitative study was conducted to investigate tanda participation of twelve Mexican American individuals across the midwestern United States. This study aimed to develop a better understanding of participants' motivations to enter, the other financial management strategies employed by participants, and the tanda's significance to family resource management. Findings revealed that participants' motivations to participate in a tanda relate to financial accessibility and cultural preferences; participants utilize a range of complementary financial management strategies concurrently with the tanda; and participants perceived the tanda as conducive to their family's financial goals and well-being, despite acknowledging the risks associated with participation. Developing a better understanding of the tanda provides insights into the ways culture serves as a conduit through which family and individual goals are realized, financial capability is bolstered, and uncertainty wrought by economic and political contexts is reduced.
ABSTRACT
We report a case of a 55-year-old male with a history of methicillin-resistant staphylococcus aureus bacteremia whose initial transesophageal echocardiography revealed a cardiac mass attached to the right atrium. Because of the uncommon location of the mass, 18F-fluorodeoxyglucose-PET was used to confirm the diagnosis of infective endocarditis.
Subject(s)
Atrial Fibrillation , Endocarditis, Bacterial , Endocarditis , Methicillin-Resistant Staphylococcus aureus , Staphylococcal Infections , Male , Humans , Middle Aged , Fluorodeoxyglucose F18 , Staphylococcal Infections/diagnostic imaging , Endocarditis/diagnostic imaging , Endocarditis, Bacterial/diagnostic imaging , Echocardiography, Transesophageal , Positron-Emission TomographyABSTRACT
Lupin is a high-protein legume crop that grows in a wide range of edaphoclimatic conditions where other crops are not viable. Its unique seed nutrient profile can promote health benefits, and it has been proposed as a phytoremediation plant. Most rhizobia nodulating Lupinus species belong to the genus Bradyrhizobium, comprising strains that are phylogenetically related to B. cytisi, B. hipponenese, B. rifense, B. iriomotense/B. stylosanthis, B. diazoefficiens, B. japonicum, B. canariense/B. lupini, and B. retamae/B. valentinum. Lupins are also nodulated by fast-growing bacteria within the genera Microvirga, Ochrobactrum, Devosia, Phyllobacterium, Agrobacterium, Rhizobium, and Neorhizobium. Phylogenetic analyses of the nod and nif genes, involved in microbial colonization and symbiotic nitrogen fixation, respectively, suggest that fast-growing lupin-nodulating bacteria have acquired their symbiotic genes from rhizobial genera other than Bradyrhizobium. Horizontal transfer represents a key mechanism allowing lupin to form symbioses with bacteria that were previously considered as non-symbiotic or unable to nodulate lupin, which might favor lupin's adaptation to specific habitats. The characterization of yet-unstudied Lupinus species, including microsymbiont whole genome analyses, will most likely expand and modify the current lupin microsymbiont taxonomy, and provide additional knowledge that might help to further increase lupin's adaptability to marginal soils and climates.
Subject(s)
Bradyrhizobium , Fabaceae , Lupinus , Rhizobium , Fabaceae/genetics , Fabaceae/microbiology , Lupinus/genetics , Lupinus/microbiology , Root Nodules, Plant/microbiology , Phylogeny , Gene Transfer, Horizontal , Health Promotion , DNA, Bacterial/genetics , Vegetables/genetics , Rhizobium/genetics , Bradyrhizobium/genetics , Symbiosis/genetics , Sequence Analysis, DNA , RNA, Ribosomal, 16S/geneticsABSTRACT
BACKGROUND: The left ventricular hemodynamic load differs between aortic regurgitation (AR) and primary mitral regurgitation (MR). We used cardiac magnetic resonance to compare left ventricular remodeling patterns, systemic forward stroke volume, and tissue characteristics between patients with isolated AR and isolated MR. METHODS: We assessed remodeling parameters across the spectrum of regurgitant volume. Left ventricular volumes and mass were compared against normal values for age and sex. We calculated forward stroke volume (planimetered left ventricular stroke volume-regurgitant volume) and derived a cardiac magnetic resonance-based systemic cardiac index. We assessed symptom status according to remodeling patterns. We also evaluated the prevalence of myocardial scarring using late gadolinium enhancement imaging, and the extent of interstitial expansion via extracellular volume fraction. RESULTS: We studied 664 patients (240 AR, 424 primary MR), median age of 60.7 (49.5-69.9) years. AR led to more pronounced increases in ventricular volume and mass compared with MR across the spectrum of regurgitant volume (P<0.001). In ≥moderate regurgitation, AR patients had a higher prevalence of eccentric hypertrophy (58.3% versus 17.5% in MR; P<0.001), whereas MR patients had normal geometry (56.7%) followed by myocardial thinning with low mass/volume ratio (18.4%). The patterns of eccentric hypertrophy and myocardial thinning were more common in symptomatic AR and MR patients (P<0.001). Systemic cardiac index remained unchanged across the spectrum of AR, whereas it progressively declined with increasing MR volume. Patients with MR had a higher prevalence of myocardial scarring and higher extracellular volume with increasing regurgitant volume (P value for trend <0.001), whereas they were unchanged across the spectrum of AR (P=0.24 and 0.42, respectively). CONCLUSIONS: Cardiac magnetic resonance identified significant heterogeneity in remodeling patterns and tissue characteristics at matched degrees of AR and MR. Further research is needed to examine if these differences impact reverse remodeling and clinical outcomes after intervention.
Subject(s)
Aortic Valve Insufficiency , Mitral Valve Insufficiency , Humans , Middle Aged , Aged , Mitral Valve Insufficiency/diagnosis , Cicatrix , Contrast Media , Gadolinium , Aortic Valve Insufficiency/diagnostic imaging , Hypertrophy , Ventricular RemodelingABSTRACT
BACKGROUND: Grading of aortic regurgitation (AR) and mitral regurgitation (MR) is similar in the cardiology guidelines despite distinct differences in left ventricular (LV) adaptive pathophysiology. OBJECTIVES: This study compared differences in LV remodeling in patients with similar degrees of AR and MR severity and evaluated optimal cutoffs for significant AR in relation to the outcome of aortic valve replacement or repair (AVR) during follow-up. METHODS: From 2008 to 2018, consecutive patients with isolated AR or MR who had cardiac magnetic resonance (CMR) were identified and CMR parameters were compared. Patients with left ventricular ejection fraction (LVEF) <50%, ischemic scar >5%, valve stenosis, or concomitant regurgitation were excluded. Patients were followed longitudinally for AVR. RESULTS: Baseline characteristics of isolated AR (n = 418) and isolated MR (n = 1,073) were comparable except for higher male proportion and hypertension in AR, while heart failure was more prevalent in MR. Indexed LV end-diastolic and end-systolic volumes and mass were higher in AR compared with MR at the same level of regurgitant fraction. During follow-up (mean 2.1 years), 18.7% of AR patients underwent AVR based on symptoms or LV remodeling. Interestingly, 38.0% of patients that underwent AVR within 3 months after CMR did not meet severe AVR by current guidelines of AR severity. AR regurgitant fraction>35% had high sensitivity (86%) and specificity (88%) for identifying patients who underwent AVR. CONCLUSIONS: For similar regurgitation severity, LV remodeling is different in AR compared with MR. Cardiac symptoms and significant LV remodeling in AR requiring AVR occur frequently in patients with less severity than currently proposed. The study findings suggest that the optimal threshold for severe AR with CMR is different than MR and is lower than currently stated in the guidelines.
Subject(s)
Aortic Valve Insufficiency , Heart Valve Diseases , Heart Valve Prosthesis Implantation , Mitral Valve Insufficiency , Ventricular Dysfunction, Left , Aortic Valve/diagnostic imaging , Aortic Valve/surgery , Aortic Valve Insufficiency/diagnostic imaging , Aortic Valve Insufficiency/etiology , Humans , Male , Predictive Value of Tests , Retrospective Studies , Stroke Volume , Ventricular Function, Left , Ventricular RemodelingABSTRACT
Nitrogen (N) and phosphorus (P) are two major plant nutrients, and their deficiencies often limit plant growth and crop yield. The uptakes of N or P affect each other, and consequently, understanding N-P interactions is fundamental. Their signaling mechanisms have been studied mostly separately, and integrating N-P interactive regulation is becoming the aim of some recent works. Lupins are singular plants, as, under N and P deficiencies, they are capable to develop new organs, the N2-fixing symbiotic nodules, and some species can also transform their root architecture to form cluster roots, hundreds of short rootlets that alter their metabolism to induce a high-affinity P transport system and enhance synthesis and secretion of organic acids, flavonoids, proteases, acid phosphatases, and proton efflux. These modifications lead to mobilization in the soil of, otherwise unavailable, P. White lupin (Lupinus albus) represents a model plant to study cluster roots and for understanding plant acclimation to nutrient deficiency. It tolerates simultaneous P and N deficiencies and also enhances uptake of additional nutrients. Here, we present the structural and functional modifications that occur in conditions of P and N deficiencies and lead to the organogenesis and altered metabolism of nodules and cluster roots. Some known N and P signaling mechanisms include different factors, including phytohormones and miRNAs. The combination of the individual N and P mechanisms uncovers interactive regulation pathways that concur in nodules and cluster roots. L. albus interlinks N and P recycling processes both in the plant itself and in nature.
ABSTRACT
Coenzyme Q10 (CoQ10) is a naturally occurring compound that is found in animals and all humans. It has a fundamental role in cellular energy production. Although it is produced in the body, tissue deficiency can occur due to medications such as statins, which inhibit the mevalonate pathway. The clinical syndromes of statin-associated muscle symptoms (SAMS) and some of the features observed in patients with heart failure (HF) may be related to blood and tissue deficiency of CoQ10. Numerous clinical trials of CoQ10 in SAMS have yielded conflicting results. Yet, the weight of evidence as reflected in meta-analyses supports the use of exogenous CoQ10 in SAMS. In patients with HF, large-scale randomized clinical trials are lacking, although one relatively contemporary trial, Q-SYMBIO, suggests an adjunctive role for CoQ10. The possibility that statin-related CoQ10 deficiency may play a role in patients with diastolic HF is an intriguing hypothesis that warrants further exploration.
Subject(s)
Ataxia/drug therapy , Cardiovascular Diseases/prevention & control , Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use , Mitochondrial Diseases/drug therapy , Muscle Weakness/drug therapy , Ubiquinone/analogs & derivatives , Ubiquinone/deficiency , Dietary Supplements , Humans , Ubiquinone/therapeutic useABSTRACT
Almost half of the world's agricultural soils are acidic, and most of them present significant levels of aluminum (Al) contamination, with Al3+ as the prevailing phytotoxic species. Lupin is a protein crop that is considered as an optimal alternative to soybean cultivation in cold climates. Lupins establish symbiosis with certain soil bacteria, collectively known as rhizobia, which are capable of fixing atmospheric nitrogen. Moreover, some lupin species, especially white lupin, form cluster roots, bottlebrush-like structures specialized in the mobilization and uptake of nutrients in poor soils. Cluster roots are also induced by Al toxicity. They exude phenolic compounds and organic acids that chelate Al to form non-phytotoxic complexes in the rhizosphere and inside the root cells, where Al complexes are accumulated in the vacuole. Lupins flourish in highly acidic soils where most crops, including other legumes, are unable to grow. Some lupin response mechanisms to Al toxicity are common to other plants, but lupin presents specific tolerance mechanisms, partly as a result of the formation of cluster roots. Al-induced lupin organic acid secretion differs from P-induced secretion, and organic acid transporters functions differ from those in other legumes. Additionally, symbiotic rhizobia can contribute to Al detoxification. After revising the existing knowledge on lupin distinct Al tolerance mechanisms, we conclude that further research is required to elucidate the specific organic acid secretion and Al accumulation mechanisms in this unique legume, but definitely, white lupin arises as a choice crop for cultivation in Al-rich acidic soils in temperate climate regions.
ABSTRACT
OBJECTIVES: This study used cardiovascular magnetic resonance (CMR) to evaluate whether elevated extracellular volume (ECV) was associated with mitral valve prolapse (MVP) or if elevated ECV was a consequence of remodeling independent of primary mitral regurgitation (MR) etiology. BACKGROUND: Replacement fibrosis in primary MR is more prevalent in MVP; however, data on ECV as a surrogate for diffuse interstitial fibrosis in primary MR are limited. METHODS: Patients with chronic primary MR underwent comprehensive CMR phenotyping and were stratified into an MVP cohort (>2 mm leaflet displacement on a 3-chamber cine CMR) and a non-MVP cohort. Factors associated with ECV and replacement fibrosis were assessed. The association of ECV and symptoms related to MR and clinical events (mitral surgery and cardiovascular death) was ascertained. RESULTS: A total of 424 patients with primary MR (229 with MVP and 195 non-MVP) were enrolled. Replacement fibrosis was more prevalent in the MVP cohort (34.1% vs. 6.7%; p < 0.001), with bi-leaflet MVP having the strongest association with replacement fibrosis (odds ratio: 10.5; p < 0.001). ECV increased with MR severity in a similar fashion for both MVP and non-MVP cohorts and was associated with MR severity but not MVP on multivariable analysis. Elevated ECV was independently associated with symptoms related to MR and clinical events. CONCLUSIONS: Although replacement fibrosis was more prevalent in MVP, diffuse interstitial fibrosis as inferred by ECV was associated with MR severity, regardless of primary MR etiology. ECV was independently associated with symptoms related to MR and clinical events. (DeBakey Cardiovascular Magnetic Resonance Study [DEBAKEY-CMR]; NCT04281823).
Subject(s)
Mitral Valve Insufficiency , Humans , Mitral Valve Insufficiency/diagnostic imaging , Mitral Valve Insufficiency/surgery , Predictive Value of TestsABSTRACT
OBJECTIVES: This study hypothesized that left ventricular (LV) enlargement in Barlow disease can be explained by accounting for the total volume load that consists of transvalvular mitral regurgitation (MR) and the prolapse volume. BACKGROUND: Barlow disease is characterized by long prolapsing mitral leaflets that can harbor a significant amount of blood-the prolapse volume-at end-systole. The LV in Barlow disease can be disproportionately enlarged relative to MR severity, leading to speculation of Barlow cardiomyopathy. METHODS: Cardiac magnetic resonance (CMR) was used to compare MR, prolapse volume, and heart chambers remodeling in patients with Barlow disease (bileaflet prolapse [BLP]) and in single leaflet prolapse (SLP). RESULTS: A total of 157 patients (81 with BLP, 76 with SLP) were included. Patients with SLP were older and more had hypertension. Patients with BLP had more heart failure. Indexed LV end-diastolic volume was larger in BLP despite similar transvalvular MR. However, the prolapse volume was larger in BLP, which led to larger total volume load compared with SLP. Increasing tertiles of prolapse volume and MR both led to an incremental increase in LV end-diastolic volume in BLP. Using the total volume load improved the correlation with indexed LV end-diastolic volume in the BLP group, which closely matched that of SLP. A multivariable model that incorporated the prolapse volume explained left heart chamber enlargement better than a MR-based model, independent of prolapse category. CONCLUSIONS: The prolapse volume is part of the total volume load exerted on the LV during the cardiac cycle and could help explain the disproportionate LV enlargement relative to MR severity noted in Barlow disease.
Subject(s)
Mitral Valve Insufficiency , Mitral Valve Prolapse , Heart Ventricles , Humans , Magnetic Resonance Spectroscopy , Mitral Valve Insufficiency/diagnostic imaging , Mitral Valve Insufficiency/etiology , Mitral Valve Prolapse/diagnostic imaging , Predictive Value of TestsABSTRACT
Background Chronic aortic regurgitation (AR) can be associated with myocardial scarring. It is unknown if scarring in AR is linked to poor outcomes and whether aortic valve replacement impacts this association. We investigated the relationship of myocardial scarring to mortality in chronic AR using cardiac magnetic resonance. Methods and Results We enrolled patients with moderate or greater AR between 2009 and 2019 and performed a blinded assessment of left ventricle remodeling, AR severity, and presence and extent of myocardial scarring by late gadolinium enhancement. The primary outcome was all-cause mortality. We followed 392 patients (median age 62 [interquartile range, 51-71] years), and 78.1% were men, and 25.8% had bicuspid valves. Median aortic valve regurgitant volume was 39 mL (interquartile range, 30-60). Myocardial scar was present in 131 (33.4%) patients. Aortic valve replacement was performed in 165 (49.1%) patients. During follow-up, up to 10.8 years (median 32.3 months [interquartile range, 9.8-69.5]), 51 patients (13%) died. Presence of myocardial scar (hazard ratio [HR], 3.62; 95% CI, 2.06-6.36; P<0.001), infarction scar (HR, 4.94; 95% CI, 2.58-9.48; P<0.001), and noninfarction scar (HR, 2.75; 95% CI, 1.39-5.44; P<0.004) were associated with mortality. In multivariable analysis, the presence of scar remained independently associated with death (HR, 2.53; 95% CI, 1.15-5.57; P=0.02). Among patients with myocardial scar, aortic valve replacement was independently associated with a lower risk of mortality (HR, 0.34; 95% CI, 0.12-0.97; P=0.03), even after adjustment for confounders. Conclusions In aortic regurgitation, myocardial scar is independently associated with a 2.5-fold increase risk in mortality. Aortic valve replacement was associated with a reduction in risk of mortality in patients with scarring.
Subject(s)
Aortic Valve Insufficiency/complications , Aortic Valve Insufficiency/mortality , Cardiomyopathies/etiology , Cicatrix/etiology , Aged , Aortic Valve Insufficiency/surgery , Cardiomyopathies/diagnostic imaging , Cardiomyopathies/mortality , Chronic Disease , Cicatrix/diagnostic imaging , Cicatrix/mortality , Cohort Studies , Female , Heart Valve Prosthesis Implantation , Humans , Magnetic Resonance Imaging , Male , Middle Aged , Proportional Hazards Models , Survival Rate , Treatment OutcomeABSTRACT
BACKGROUND: Quantitation of tricuspid regurgitant (TR) severity can be challenging with conventional echocardiographic imaging and may be better evaluated using cardiovascular magnetic resonance (CMR). OBJECTIVES: In patients with functional TR, this study sought to examine the relationship between TR volume (TRVol) and TR fraction (TRF) with all-cause mortality. METHODS: We examined 547 patients with functional TR using CMR to quantify TRVol and TRF. The primary outcome was all-cause mortality. Thresholds for mild, moderate, and severe TR were derived based on natural history outcome data. RESULTS: During a median follow-up of 2.6 years (interquartile range: 1.7 to 3.3 years), there were 93 deaths, with an estimated 5-year survival of 79% (95% confidence interval [CI]: 73% to 83%). After adjustment of clinical and imaging variables, including RV function, both TRF (adjusted hazard ratio [AHR] per 10% increment: 1.26; 95% CI: 1.10 to 1.45; p = 0.001) and TRVol (AHR per 10-ml increment: 1.15; 95% CI: 1.04 to 1.26; p = 0.004) were associated with mortality. Patients in the highest-risk strata of TRVol ≥45 ml or TRF ≥50% had the worst prognosis (AHR: 2.26; 95% CI: 1.36 to 3.76; p = 0.002 for TRVol and AHR: 2.60; 95% CI: 1.45 to 4.66; p = 0.001 for TRF). CONCLUSIONS: This is the first study to use CMR to assess independent prognostic implications of functional TR. Both TRF and TRVol were associated with increased mortality after adjustment for clinical and imaging covariates, including right ventricular ejection fraction. A TRVol of ≥45 ml or TRF of ≥50% identified patients in the highest-risk strata for mortality. These CMR thresholds should be used for patient selection in future trials to determine if tricuspid valve intervention improves outcomes in this high-risk group.
Subject(s)
Magnetic Resonance Imaging, Cine/trends , Tricuspid Valve Insufficiency/diagnostic imaging , Tricuspid Valve Insufficiency/mortality , Aged , Cohort Studies , Female , Follow-Up Studies , Humans , Male , Middle Aged , Mortality/trends , Prospective Studies , Tricuspid Valve Insufficiency/physiopathologyABSTRACT
Resumen Objetivo: Describir el tratamiento del ictus isquémico agudo con reperfusión endovenosa y determinar los factores asociados al rendimiento funcional de pacientes sometidos a trombolisis en un hospital peruano. Material y Métodos: Estudio prospectivo y longitudinal de una cohorte de pacientes con ictus isquémico que recibieron rtPA en un periodo de 3 años. Se evaluó la relación entre datos demográficos y clínicos y el estado funcional a los 3 meses de la intervención. La asociación del pronóstico funcional se valoró mediante el modelo de regresión simple y multivariado de Poisson, y el Riesgo Relativo (RR) con un intervalo de confianza (IC) al 95%, como medida de asociación. Resultados: Durante el periodo del estudio, 74 pacientes (1.19% del total) recibieron el tratamiento. El 68,18% logró independencia funcional (mRS 0-2) a los 90 días. La mortalidad fue de 6 % y un 3% mostró hemorragia intracerebral (HIC). Glicemia >140 mg/dl (OR 5,12; 1,31-20,02; p=0,019) e infarto de tipo posterior (OR 7,47; 1,01-55,15; p =0,04) se asociaron a un mayor riesgo de dependencia funcional. Conclusiones: En la cohorte estudiada, la mayoría de los pacientes alcanzaron independencia funcional a los 3 meses de tratamiento trombolítico. La hiperglicemia (>140gr/dl) y el infarto vertebro-basilar se asociaron con un mayor riesgo de dependencia funcional.
SUMMARY Objective: To describe the treatment of acute ischemic strokes with intravenous rtPA and determine the factors associated with the functional outcomes of patients treated with thrombolysis in a Peruvian hospital. Material and Methods: A prospective, longitudinal cohort study of patients with ischemic stroke who received rtPA over a period of 3 years was performed. The association of demographic and clinical data with functional status was assessed 3 months after the intervention. Simple and multivariate Poisson regression models were performed to evaluate associations with functional prognosis, and Relative Risk (RR) with a 95% confidence interval (CI) was used as a measure of association. Results: During the study period, 74 patients (1.19% of the total) received IV thrombolysis, and 68.18% of them achieved functional independence (mRS 0-2) at 90 days. We found a mortality of 6%, an intracerebral hemorrhage (ICH) rate of 3%. Glycemia >140 mg/dl (OR 5.12; 1.31-20.02; p = 0.019), and posterior circulation infarcts (OR 7.47; 1.01-55.15; p = 0,04) were associated with an increased risk of functional dependency. Conclusions: In the studied cohort, most of the patients who underwent thrombolytic therapy achieved a functional independence at 3 months. Hyperglycemia (>140gr/dl) and vertebro-basilar infarcts were associated with an increased risk of functional dependence.
Subject(s)
Extracellular Fluid/diagnostic imaging , Mitral Valve Insufficiency/diagnostic imaging , Extracellular Fluid/physiology , Female , Fibrosis/diagnostic imaging , Fibrosis/physiopathology , Humans , Magnetic Resonance Imaging, Cine/methods , Male , Middle Aged , Mitral Valve Insufficiency/physiopathology , Prognosis , Prospective StudiesABSTRACT
Echocardiograms are the second most frequently utilized cardiac test after electrocardiograms and are most commonly ordered by noncardiology providers. Echocardiogram reports are designed to communicate a comprehensive interpretation of cardiac function; however, it is not known how well these reports are understood by ordering providers. In order to identify gaps in understanding and target potential areas for improvement, we developed a questionnaire testing various topics reported on a standard transthoracic echocardiogram report. This questionnaire was administered to general medicine and cardiology trainees and attending physicians at 2 large academic institutions. Questionnaire response rate was 81%. There were several topics that were not well understood by general providers; these included viability of an akinetic region, pulmonary artery systolic pressure, left ventricular filling pressure, recognition of abnormal structures, and method of identifying of intracardiac thrombus. In conclusion, strategies such as improved communication techniques and adjustment of reporting format should be implemented to increase the clinical value of the echocardiogram.