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1.
Int J Cardiovasc Imaging ; 40(3): 487-497, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38123867

RESUMO

To determine the blood pressure independent effects of spironolactone on left atrial (LA) size and function in patients with resistant hypertension (RHTN). Patients with RHTN (n = 36, mean age 55 ± 7) were prospectively recruited. Spironolactone was initiated at 25 mg/day and increased to 50 mg/day after 4 weeks. Other antihypertensives were withdrawn to maintain constant blood pressure. Cardiac magnetic resonance imaging was performed at baseline and after 6 months of spironolactone treatment and changes in LA functional metrics were assessed. LA size and function parameters were improved (p < 0.05) from baseline to month-6: LA volumes indexed to body surface area (LAVI) were reduced (LAVImaximum 41.4 ± 12 vs. 33.2±9.7 mL/m2; LAVIpre-A 32.6 ± 9.8 vs. 25.6 ± 8.1 mL/m2; median LAVIminimum 18.5 [13.9-24.8] vs. 14.1 [10.9-19.2] mL/m2); left atrioventricular coupling index was reduced (28.2 ± 11.5 vs. 22.7 ± 9.2%); LA emptying fractions (LAEF) were increased (median total LAEF 52.4 [48.7-60.3] vs. 55.9 [50.3-61.1] %; active LAEF 40.2 ± 8.6 vs. 43.1 ± 7.8%). LA global longitudinal strain in the active phase was increased (16.3 ± 4.1 vs. 17.8 ± 4.2%). The effect of spironolactone was similar in patients with high (N = 18) and normal (N = 18) aldosterone status (defined by plasma renin activity and 24-h urine aldosterone). Treatment of RHTN with spironolactone is associated with improvements in LA size and function, and atrioventricular coupling, regardless of whether aldosterone levels were normal or high at baseline. This study suggests the need for larger prospective studies examining effects of mineralocorticoid receptor antagonists on atrial function and atrioventricular coupling.


Assuntos
Hipertensão , Espironolactona , Humanos , Pessoa de Meia-Idade , Espironolactona/efeitos adversos , Função do Átrio Esquerdo/fisiologia , Aldosterona , Estudos Prospectivos , Valor Preditivo dos Testes , Hipertensão/diagnóstico , Hipertensão/tratamento farmacológico , Hipertensão/complicações , Átrios do Coração
2.
Int J Cardiol ; 387: 131102, 2023 09 15.
Artigo em Inglês | MEDLINE | ID: mdl-37257514

RESUMO

BACKGROUND: Left atrial (LA) strain is impaired in left ventricular (LV) diastolic dysfunction, associated with increased LV end diastolic pressure (LVEDP). In patients with preserved LV ejection fraction (LVEF), coronary artery disease (CAD) is known to impair LV diastolic function. The relationship of LVEDP with CAD and impact on LA strain is not well studied. METHODS AND RESULTS: Patients with LVEF >50% (n = 37, age 61 ± 7 years) underwent coronary angiography, high-fidelity LV pressure measurements and cardiac magnetic resonance imaging. LA volumes, LA emptying fraction (LAEF), LA reservoir strain (LARS) and LA long-axis shortening (LALAS) were measured. By coronary angiography, patients were assigned into 3 groups: severe-CAD (n = 19, with obstruction of major coronary arteries >70% and/or history of coronary revascularization), mild-to-moderate-CAD (n = 10, obstruction of major coronary arteries 30-60%), and no-CAD (n = 8, obstruction of major coronary arteries and branches <30%). Overall, LVEF was 65 ± 8% and LVEDP was 14.4 ± 5.6 mmHg. Clinical characteristics, LVEDP and LV function measurements were similar in 3 groups. Severe-CAD group had lower LAEF, LALAS and LARS than those in no-CAD group (P < 0.05 all). In regression analysis, LARS and LALAS were associated with CAD severity and treatment with Nitrates, whereas LAEF and LAEFactive were associated with CAD severity, treatment with Nitrates and LA minimum volume (P < 0.05 all). LAEFpassive was associated with LVED volume (P < 0.05). CONCLUSIONS: LA functional impairment may be affected by coexistent CAD severity, medications, in particular, Nitrates, and loading conditions, which should be considered when assessing LA function and LA-LV interaction. Our findings inspire exploration in a larger cohort.


Assuntos
Doença da Artéria Coronariana , Disfunção Ventricular Esquerda , Humanos , Pessoa de Meia-Idade , Idoso , Doença da Artéria Coronariana/diagnóstico por imagem , Nitratos , Função Ventricular Esquerda , Volume Sistólico , Disfunção Ventricular Esquerda/diagnóstico por imagem , Função do Átrio Esquerdo
3.
J Clin Hypertens (Greenwich) ; 25(5): 416-425, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37013369

RESUMO

Resistant hypertension (RHTN), defined as blood pressure (BP) that is uncontrolled with ≥3 medications, including a long-acting thiazide diuretic, also includes a subset with BP that is controlled with ≥4 medications, so-called controlled RHTN. This resistance is attributed to intravascular volume excess. Patients with RHTN overall have a higher prevalence of left ventricular hypertrophy (LVH) and diastolic dysfunction compared to patients with non-RHTN. We tested the hypothesis that patients with controlled RHTN due to the intravascular volume excess have higher left ventricular mass index (LVMI), higher prevalence of LVH, larger intracardiac volumes, and more diastolic dysfunction compared to patients with controlled non-resistant hypertension (CHTN), defined as BP controlled with ≤3 anti-hypertensive medications. Patients with controlled RHTN (n = 69) or CHTN (n = 63) who were treated at the University of Alabama at Birmingham were offered enrollment and underwent cardiac magnetic resonance imaging. Diastolic function was assessed by peak filling rate, time needed in diastole to recover 80% of stroke volume, E:A ratios and left atrial volume. LVMI was higher in patients with controlled RHTN (64.4 ± 22.5 vs 56.9 ± 11.5; P = .017). Intracardiac volumes were similar in both groups. Diastolic function parameters were not significantly different between groups. There were no significant differences in age, gender, race, body mass index, dyslipidemia between the two groups. The findings show that patients with controlled RHTN have higher LVMI, but comparable diastolic function to those of patients with CHTN.


Assuntos
Insuficiência Cardíaca , Hipertensão , Humanos , Hipertensão/tratamento farmacológico , Hipertensão/epidemiologia , Remodelação Ventricular , Pressão Sanguínea , Anti-Hipertensivos/uso terapêutico , Anti-Hipertensivos/farmacologia , Hipertrofia Ventricular Esquerda/diagnóstico por imagem , Hipertrofia Ventricular Esquerda/epidemiologia , Átrios do Coração , Diástole
4.
Cardiovasc Eng Technol ; 14(3): 447-456, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36971975

RESUMO

PURPOSE: Knowledge of the timing of cardiac valve opening and closing is important in cardiac physiology. The relationship between valve motion and electrocardiogram (ECG) is often assumed, however is not clearly defined. Here we investigate the accuracy of cardiac valve timing estimated using only the ECG, compared to Doppler echocardiography (DE) flow imaging as the gold standard. METHODS: DE was obtained in 37 patients with simultaneous ECG recording. ECG was digitally processed and identifiable features (QRS, T, P waves) were examined as potential reference points to determine opening and closure of aortic and mitral valves, as compared to DE outflow and inflow measurement. Timing offset of the cardiac valves opening and closure between ECG features and DE was measured from derivation set (n = 19). The obtained mean offset in combination with the ECG features model was then evaluated on a validation set (n = 18). Using the same approach, additional measurement was also done for the right sided valves. RESULTS: From the derivation set, we found a fixed offset of 22 ± 9 ms, 2 ± 13 ms, 90 ± 26 ms, and - 2 ± - 27 ms when comparing S to aortic valve opening, Tend to aortic valve closure, Tend to mitral valve opening, and R to mitral valve closure respectively. Application of this model to the validation set showed good estimation of aortic and mitral valve opening and closure timing value, with low model absolute error (median of the mean absolute error of the four events = 19 ms compared to the gold standard DE measurement). For the right-sided (tricuspid and pulmonic) valves in our patient set, there was considerably higher median of the mean absolute error of 42 ms for the model. CONCLUSION: ECG features can be used to estimate aortic and mitral valve timings with good accuracy as compared to DE, allowing useful hemodynamic information to be derived from this easily available test.


Assuntos
Valva Aórtica , Valva Pulmonar , Humanos , Valva Aórtica/diagnóstico por imagem , Valva Aórtica/fisiologia , Eletrocardiografia/métodos , Valva Mitral/diagnóstico por imagem , Hemodinâmica
5.
J Am Heart Assoc ; 11(24): e027812, 2022 12 20.
Artigo em Inglês | MEDLINE | ID: mdl-36515240

RESUMO

Background Virtual interviewing for cardiology fellowship was instituted in the 2021 fellowship application cycle because of the COVID-19 pandemic and restricted travel. The impact on geographic patterns of fellow-training program matching is unknown. This study sought to determine if there was a difference in geographic placement of matched fellows for cardiology fellowship match after initiation of virtual interviews compared with in-person interviewing. Methods and Results All US-based accredited cardiovascular disease fellowship programs that participated in the 2019 to 2021 fellowship match cycles and had publicly available data with fellowship and residency training locations and training year were included. Each fellow was categorized based on whether their fellowship and residency programs were in the same institution, same state, same US census region, or different census region. Categories were mutually exclusive. Of 236 eligible programs, 118 (50%) programs were identified, composed of 1787 matched fellows. Compared with the previrtual cohort (n=1178 matched fellows), there was no difference in the geographic placement during the 2021 virtual cycle (n=609 matched fellows) (P=0.19), including the proportion matched at the same program (30.6% versus 31.5%), same state but different program (13% versus 13.8%), same region but different state (24.2% versus 19.7%), or different region (35% versus 33.1%). There was also no difference when stratified by program size or geographic region. Conclusions The use of virtual interviewing in the 2021 cardiology fellowship application cycle showed no significant difference in the geographic placement of matched fellows compared with in-person interviewing. Further study is needed to evaluate the impact of virtual interviewing and optimize its use in fellowship recruitment.


Assuntos
COVID-19 , Cardiologia , Internato e Residência , Humanos , Bolsas de Estudo , Pandemias , COVID-19/epidemiologia , Educação de Pós-Graduação em Medicina
6.
Hypertension ; 79(4): 775-784, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-35164526

RESUMO

BACKGROUND: We previously reported increased plasma XO (xanthine oxidase) activity in patients with resistant hypertension. Increased XO can cause mitochondrial DNA damage and promote release of fragments called mitochondrial DNA damage-associated molecular patterns (mtDNA DAMPs). Here, we report racial differences in XO activity and mtDNA DAMPs in Black and White adults with resistant hypertension. METHODS: This retrospective study includes 91 resistant hypertension patients (44% Black, 47% female) with blood pressure >140/90 mm Hg on ≥4 medications and 37 normotensive controls (30% Black, 54% female) with plasma XO activity, mtDNA DAMPs, and magnetic resonance imaging of left ventricular morphology and function. RESULTS: Black-resistant hypertension patients were younger (mean age 52±10 versus 59±10 years; P=0.001), with higher XO activity and left ventricular wall thickness, and worse diastolic dysfunction than White resistant hypertension patients. Urinary sodium excretion (mg/24 hour per kg) was positively related to left ventricular end-diastolic volume (r=0.527, P=0.001) and left ventricular mass (r=0.394, P=0.02) among Black but not White resistant hypertension patients. Patients with resistant hypertension had increased mtDNA DAMPs versus controls (P<0.001), with Black mtDNA DAMPS greater than Whites (P<0.001). Transmission electron microscopy of skeletal muscle biopsies in resistant hypertension patients demonstrates mitochondria cristae lysis, myofibrillar loss, large lipid droplets, and glycogen accumulation. CONCLUSIONS: These data warrant a large study to examine the role of XO and mitochondrial mtDNA DAMPs in cardiac remodeling and heart failure in Black adults with resistant hypertension.


Assuntos
Hipertensão , Xantina Oxidase , Adulto , DNA Mitocondrial/genética , Feminino , Humanos , Hipertensão/genética , Masculino , Pessoa de Meia-Idade , Mitocôndrias , Fatores Raciais , Estudos Retrospectivos
7.
Physiol Meas ; 43(2)2022 03 07.
Artigo em Inglês | MEDLINE | ID: mdl-35073533

RESUMO

Objective.We developed a method using cardiovascular magnetic resonance imaging to model the untwisting of the left ventricle (LV) as a damped torsional harmonic oscillator to estimate shear modulus (intrinsic myocardial stiffness) and frictional damping, then applied this method to evaluate the torsional stiffness of patients with resistant hypertension (RHTN) compared to a control group.Approach.The angular displacement of the LV during diastole was measured. Myocardial shear modulus and damping constant were determined by solving a system of equations modeling the diastolic untwisting as a damped, unforced harmonic oscillator, in 100 subjects with RHTN and 36 control subjects.Main Results.Though overall torsional stiffness was increased in RHTN (41.7 (27.1-60.7) versus 29.6 (17.3-35.7) kdyn*cm;p = 0.001), myocardial shear modulus was not different between RHTN and control subjects (0.34 (0.23-0.50) versus 0.33 (0.22-0.46) kPa;p= 0.758). RHTN demonstrated an increase in overall diastolic frictional damping (6.13 ± 3.77 versus 3.35 ± 1.70 kdyn*cm*s;p< 0.001), but no difference in damping when corrected for the overlap factor (74.3 ± 25.9 versus 68.0 ± 24.0 dyn*s/cm3;p = 0.201). There was an increase in the polar moment (geometric component of stiffness; 11.47 ± 6.95 versus 7.58 ± 3.28 cm4;p<0.001).Significance.We have developed a phenomenological method, estimating the intrinsic stiffness and relaxation properties of the LV based on restorative diastolic untwisting. This model finds increased overall stiffness in RHTN and points to hypertrophy, rather than tissue- level changes, as the major factor leading to increased stiffness.


Assuntos
Ventrículos do Coração , Contração Miocárdica , Diástole , Ventrículos do Coração/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Função Ventricular Esquerda
8.
J Am Heart Assoc ; 10(17): e019434, 2021 09 07.
Artigo em Inglês | MEDLINE | ID: mdl-34459249

RESUMO

Background Aortic stiffness is an independent predictor of cardiovascular events in patients with arterial hypertension. Resistant hypertension is often linked to hyperaldosteronism and associated with adverse outcomes. Spironolactone, a mineralocorticoid receptor antagonist, has been shown to reduce both the arterial blood pressure (BP) and aortic stiffness in resistant hypertension. However, the mechanism of aortic stiffness reduction by spironolactone is not well understood. We hypothesized that spironolactone reduces aortic stiffness in resistant hypertension independently of BP change. Methods and Results Patients with uncontrolled BP (≥140/90 mm Hg) despite use of ≥3 antihypertensive medications (including diuretics) were prospectively recruited. Participants were started on spironolactone at 25 mg/d, and increased to 50 mg/d at 4 weeks while other antihypertensive medications were withdrawn to maintain constant mean BP. Phase-contrast cardiac magnetic resonance imaging of the ascending aorta was performed in 30 participants at baseline and after 6 months of spironolactone treatment to measure aortic pulsatility, distensibility, and pulse wave velocity. Pulse wave velocity decreased (6.3±2.3 m/s to 4.5±1.8 m/s, P<0.001) and pulsatility and distensibility increased (15.9%±5.3% to 22.1%±7.9%, P<0.001; and 0.28%±0.10%/mm Hg to 0.40%±0.14%/mm Hg, P<0.001, respectively) following 6 months of spironolactone. Conclusions Our results suggest that spironolactone improves aortic properties in resistant hypertension independently of BP, which may support the hypothesis of an effect of aldosterone on the arterial wall. A larger prospective study is needed to confirm our findings.


Assuntos
Anti-Hipertensivos/uso terapêutico , Hipertensão , Espironolactona/uso terapêutico , Rigidez Vascular , Pressão Sanguínea/efeitos dos fármacos , Humanos , Hipertensão/diagnóstico , Hipertensão/tratamento farmacológico , Análise de Onda de Pulso , Rigidez Vascular/efeitos dos fármacos
9.
BMC Cardiovasc Disord ; 21(1): 375, 2021 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-34348657

RESUMO

BACKGROUND: Half of U.S. adults have received at least one dose of the COVID-19 vaccines produced by either Pfizer, Moderna, or Johnson and Johnson, which represents a major milestone in the ongoing pandemic. Given the emergency use authorizations for these vaccines, their side effects and safety were assessed over a compressed time period. Hence, ongoing monitoring for vaccine-related adverse events is imperative for a full understanding and delineation of their safety profile. CASE PRESENTATION: An 22-year-old Caucasian male presented to our hospital center complaining of pleuritic chest pain. Six months prior he had a mild case of COVID-19, but was otherwise healthy. He had received his first dose of the Moderna vaccine three days prior to developing symptoms. Laboratory analysis revealed a markedly elevated troponin and multiple imaging modalities during his hospitalization found evidence of wall motion abnormalities consistent with a diagnosis of perimyocarditis. He was started on aspirin and colchicine with marked improvement of his symptoms prior to discharge. CONCLUSIONS: We present a case of perimyocarditis that was temporally related to COVID-19 mRNA vaccination in an young male with prior COVID-19 infection but otherwise healthy. Our case report highlights an albeit rare but important adverse event for clinicians to be aware of. It also suggests a possible mechanism for the development of myocardial injury in our patient.


Assuntos
Vacinas contra COVID-19/efeitos adversos , Miocardite/induzido quimicamente , Vacina de mRNA-1273 contra 2019-nCoV , Anti-Inflamatórios/uso terapêutico , Aspirina/uso terapêutico , Vacinas contra COVID-19/administração & dosagem , Colchicina/uso terapêutico , Humanos , Esquemas de Imunização , Masculino , Miocardite/diagnóstico por imagem , Miocardite/tratamento farmacológico , Miocardite/fisiopatologia , Recuperação de Função Fisiológica , Resultado do Tratamento , Adulto Jovem
10.
J Invasive Cardiol ; 33(9): E687-E693, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34398810

RESUMO

BACKGROUND: Anomalous coronary arteries (ACAs) may present increased risk for adverse cardiac events. We sought to evaluate the accuracy of conventional coronary angiography (CCA), as it is currently used in clinical practice, compared with expert interpretation and cardiac magnetic resonance imaging (CMR) in determining the site of origin and proximal course of ACAs. METHODS: Fifty consecutive patients without concomitant congenital heart disease, who were referred for CMR to diagnose the course of an ACA, were retrospectively evaluated. Original CCA reports were reviewed. Angiography images were available in all patients and were interpreted by 2 experts blinded to the prior interpretation and CMR results. The accuracy of interpretation in each group was then compared to the current gold standard of CMR. RESULTS: Identification of the site of origin (ie, aortic sinus) by referring angiographers was similar to that of expert angiographers (sensitivity, 89% vs 98%, respectively; P=.10). However, referring angiographers were less likely to correctly identify the proximal course as compared with expert angiographers (sensitivity, 27% vs 98%, respectively; P<.001). CONCLUSIONS: As it is used in current practice, CCA does not provide sufficient diagnostic accuracy for identifying the proximal course of an ACA. Review by expert angiographers added sensitivity, improving the accuracy to nearly 100%. Expert consultation may be nearly as accurate as advanced imaging, and should be considered in cases of ACA in which there is diagnostic uncertainty.


Assuntos
Anomalias dos Vasos Coronários , Angiografia Coronária , Anomalias dos Vasos Coronários/diagnóstico por imagem , Humanos , Angiografia por Ressonância Magnética , Imageamento por Ressonância Magnética , Estudos Retrospectivos
11.
Echocardiography ; 38(2): 197-206, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33319426

RESUMO

BACKGROUND: In 2016, the American Society of Echocardiography (ASE) released guidelines for identifying left ventricular (LV) diastolic dysfunction (DD), but its ability to detect early hemodynamic abnormalities is not well established, especially in the setting of subclinical coronary artery disease (CAD). We hypothesize that the accuracy of ASE categorization of early LVDD is affected by knowledge of whether CAD history is present. METHODS: We studied 34 patients (age 62 ± 7 years) with NYHA class I to II symptoms and with transthoracic echocardiography without findings suggesting myocardial disease (all with preserved LV ejection fraction), who underwent cardiac catheterization with high-fidelity LV pressure measurement. Echocardiographic images were evaluated for LVDD using ASE algorithm without and with knowledge of CAD history and angiography findings. CAD was considered as having DD for the algorithm. RESULTS: CAD was identified in 22 patients at catheterization (65%). Using ASE guidelines without including history of CAD or angiographic results, 29 patients were DD-, 3 were DD+ (all grade II), and 2 were indeterminate. Inclusion of CAD history recategorized 59% (n = 20) patients to DD+ (all grade I) from DD- (P < .0001). Nineteen of the recategorized patients (95%) had increased isovolumetric relaxation time (IVRT). The addition of echocardiographic IVRT improved discrimination between DD- and DD+, when the presence of CAD is unknown. CONCLUSIONS: 2016-ASE algorithm reasonably accurately identifies early LVDD at rest as reflected by LV catheterization when CAD is disclosed, but without knowledge of the presence of CAD, it underdiagnoses DD+ grade I. The addition of IVRT may improve early LVDD diagnostics.


Assuntos
Doença da Artéria Coronariana , Disfunção Ventricular Esquerda , Idoso , Doença da Artéria Coronariana/diagnóstico , Doença da Artéria Coronariana/diagnóstico por imagem , Diástole , Ecocardiografia , Humanos , Pessoa de Meia-Idade , Volume Sistólico , Disfunção Ventricular Esquerda/diagnóstico por imagem , Função Ventricular Esquerda
13.
Eur Respir Rev ; 29(156)2020 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-32620585

RESUMO

Pulmonary hypertension (PH) is a clinical condition characterised by elevation of pulmonary arterial pressure (PAP) above normal range due to various aetiologies. While cardiac right-heart catheterisation (RHC) remains the gold standard and mandatory for establishing the diagnosis of PH, noninvasive imaging of the heart plays a central role in the diagnosis and management of all forms of PH. Although Doppler echocardiography (ECHO) can measure a range of haemodynamic and anatomical variables, it has limited utility for visualisation of the pulmonary artery and, oftentimes, the right ventricle. Cardiovascular magnetic resonance (CMR) provides comprehensive information about the anatomical and functional aspects of the pulmonary artery and right ventricle that are of prognostic significance for assessment of long-term outcomes in disease progression. CMR is suited for serial follow-up of patients with PH due to its noninvasive nature, high sensitivity to changes in anatomical and functional parameters, and high reproducibility. In recent years, there has been growing interest in the use of CMR derived parameters as surrogate endpoints for early-phase PH clinical trials. This review will discuss the role of CMR in the diagnosis and management of PH, including current applications and future developments, in comparison to other existing major imaging modalities.


Assuntos
Hipertensão Pulmonar/diagnóstico por imagem , Hipertensão Pulmonar/terapia , Imageamento por Ressonância Magnética/métodos , Ventrículos do Coração/diagnóstico por imagem , Humanos , Artéria Pulmonar/diagnóstico por imagem , Sensibilidade e Especificidade
14.
ESC Heart Fail ; 7(4): 1676-1687, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32424980

RESUMO

AIMS: Prior evidence has implicated leucocyte expansion in several cardiovascular disorders, including heart failure (HF) with reduced ejection fraction (rEF). However, the prognostic importance of leucocyte count in HF with preserved EF (HFpEF) remains largely unexplored. METHODS AND RESULTS: The Americas cohort of the treatment of preserved cardiac function heart failure with an aldosterone antagonist (TOPCAT-Americas) was used to evaluate the association between total leucocyte count and clinical outcomes in HFpEF. The primary outcome was a composite of aborted cardiac arrest, cardiovascular mortality, or hospitalization for HF. Secondary outcomes were hospitalization for HF, aborted cardiac arrest, stroke, non-fatal myocardial infarction (MI), cardiovascular mortality, non-cardiovascular mortality, and all-cause mortality. Survival models were used to identify the risk of the primary and secondary outcomes in those with leucocyte count above the median (7100 cells/µL), as compared to those with leucocyte count below the median, during the follow-up period. A total of 1746 (out of 1767; 99%) patients from TOPCAT-Americas were available for the analyses with a median follow up of 2.4 (25th to 75th percentile 1.4-3.9) years. Patients with leucocyte count >7100 cells/µL were 36% more likely to experience the primary endpoint compared to those with ≤7100 cells/µL (hazard ratio: 1.36, 95% confidence interval: 1.14-1.61). This association remained significant after extensive adjustment for potential confounders (hazard ratio: 1.27, 95% confidence interval: 1.06-1.52). We also observed a greater incidence of HF hospitalization and non-fatal MI in patients with higher leucocyte count. These associations remained robust on sensitivity analyses, suggesting a low probability of confounding. Exploratory analyses suggested that both higher leucocyte count (integrating the combined influence of both myeloid and lymphoid immune cells) and augmented platelet count (as a surrogate for myeloid immune cell expansion) in the same model were associated with the primary outcome (both P < 0.05). CONCLUSIONS: Leucocyte count >7100 cells/µL was independently associated with adverse clinical outcomes in HFpEF patients from TOPCAT-Americas. These results were primarily driven by the HF hospitalization outcome but were also accompanied by an excess of non-fatal MI. Further research is needed to define the mechanisms underlying our findings and their prognostic implications.


Assuntos
Doenças Cardiovasculares , Insuficiência Cardíaca , Doenças Cardiovasculares/epidemiologia , Fatores de Risco de Doenças Cardíacas , Insuficiência Cardíaca/epidemiologia , Humanos , Fatores de Risco , Volume Sistólico
16.
JACC Basic Transl Sci ; 5(2): 109-122, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32140620

RESUMO

Increasing left atrial (LA) size predicts outcomes in patients with isolated mitral regurgitation (MR). Chymase is plentiful in the human heart and affects extracellular matrix remodeling. Chymase activation correlates to LA fibrosis, LA enlargement, and a decreased total LA emptying fraction in addition to having a potential intracellular role in mediating myofibrillar breakdown in LA myocytes. Because of the unreliability of the left ventricular ejection fraction in predicting outcomes in MR, LA size and the total LA emptying fraction may be more suitable indicators for timing of surgical intervention.

17.
J Nucl Cardiol ; 27(2): 410-416, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31975328

RESUMO

The 2019 American College of Cardiology Scientific Sessions displayed innovation in many areas for the evaluation and management of cardiovascular disease from preventive evaluation and care to advanced interventions. Imaging played a central role in these developments with a highlight of the conference being the imaging research presented. This review will summarize key imaging studies which were presented at this scientific meeting which will lead to innovation in the evaluation and management of cardiovascular disease. Experts in nuclear imaging (DW/MA), echocardiography (MS), cardiac magnetic resonance (SL), and cardiac computed tomography (RB) selected abstracts which they found to be of particular interest to the multimodality imaging audience and were integrated into this review (LP).


Assuntos
Cardiologia/tendências , Doenças Cardiovasculares/diagnóstico por imagem , Ecocardiografia/métodos , Coração/diagnóstico por imagem , Imagem Multimodal/tendências , Tomografia por Emissão de Pósitrons/métodos , Cardiologia/métodos , Congressos como Assunto , Diagnóstico por Imagem , Humanos , Valva Mitral/diagnóstico por imagem , Imagem Multimodal/métodos , Medicina Nuclear , Intervenção Coronária Percutânea/métodos , Risco , Sociedades Médicas , Tomografia Computadorizada de Emissão de Fóton Único , Tomografia Computadorizada por Raios X/métodos , Estados Unidos
19.
Echocardiography ; 36(6): 1181-1190, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31087463

RESUMO

PURPOSE: Phase-contrast cardiovascular magnetic resonance (PC-CMR) quantification of intracardiac shunt (measuring the pulmonary to systemic flow ratio, Qp/Qs) is typically determined by measuring flow through planes perpendicular the pulmonary trunk (PA) and ascending aorta (Ao). This method is subject to error from presence of background velocity offsets and requires two scan acquisitions. We evaluated an alternate PC-CMR technique for quantifying Qp/Qs using a single modified plane that encompasses both the PA and Ao. MATERIAL AND METHODS: In 53 patients evaluated for intracardiac shunting, PC-CMR measurement in the individual Ao and PA planes and also in a single-acquisition plane was obtained and Qp/Qs calculated by each method. Bland-Altman analysis was performed to evaluate the agreement between the two methods. RESULTS: The 95% confidence limits of agreement ranged from -0.52 to +0.34 indicating good agreement between the two methods. There was excellent agreement on the clinically relevant threshold value of Qp/Qs ratio of 1.5 (representing criteria for surgical correction of shunt). CONCLUSIONS: Qp/Qs determined from the single-acquisition approach agrees well with that of the individual PA and Ao method and offers potential improved accuracy (due to background velocity offset).


Assuntos
Aorta/diagnóstico por imagem , Comunicação Interatrial/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Artéria Pulmonar/diagnóstico por imagem , Circulação Pulmonar/fisiologia , Adulto , Aorta/fisiopatologia , Feminino , Comunicação Interatrial/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Artéria Pulmonar/fisiopatologia , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Adulto Jovem
20.
Int J Cardiol Heart Vasc ; 23: 100365, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31111086

RESUMO

BACKGROUND: Left ventricular (LV) remodeling and diastolic properties are affected by both underlying cardiovascular disease/cardiovascular disease risk factors (CVDRFs) and corresponding medication therapy. However, these effects may not be apparent in patients with multiple CVDRFs. We evaluated the effect of medication classes on hemodynamics in a patient cohort with normal LV dimensions and systolic function. METHODS: In 38 participants (61 ±â€¯7 years, 64 ±â€¯9% LV ejection fraction) undergoing coronary angiography, LV pressure measurement and cardiac magnetic resonance imaging was performed. The effects of coronary artery disease (CAD), CVDRFs and their corresponding medication therapy on LV parameters were analyzed considering the number of CAD/CVDRFs and 'adequacy' of medication therapy to address each existing condition with specific indication-based medication classes. RESULTS: Of the patients studied, 68% had CAD, 87% had hypertension, 87% had dyslipidemia, and 45% had diabetes. Neither individual or total number of CAD/CVDRFs were associated with overall differences in LV diastolic parameters. However, those without (n = 20) and with (n = 18) 'adequate' medication therapy for underlying CAD/CVDRFs differed in values of LV end diastolic pressure (17 ±â€¯4 vs. 11 ±â€¯5 mm Hg, P < 0.001), wall stress (3.9 ±â€¯1.6 vs. 2.2 ±â€¯1.2 x1000 N/m2, P < 0.001), pressure/volume ratio (0.13 ±â€¯0.04 vs. 0.08 ±â€¯0.03 mm Hg/ml, P < 0.01), and mass/volume ratio (0.77 ±â€¯0.20 vs. 0.92 ±â€¯0.24 g/ml, P < 0.05), but not in systolic blood pressure or LV mass index. CONCLUSIONS: Our results suggest an association between the degree of LV diastolic impairment and LV remodeling with the intensity of treatment for CAD/CVDRFs. Comprehensive treatment of all identified CAD/CVDRFs may be an important factor for the preservation of diastolic function.

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