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1.
J Card Fail ; 27(8): 915-919, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34364670

RESUMO

BACKGROUND: Whether rhythm control for post-operative atrial fibrillation after cardiac surgery (POAF) is superior to rate control in patients with heart failure or systolic dysfunction (HF) is not known. METHODS: We performed a post-hoc analysis of a trial by the Cardiothoracic Surgical Trials Network, which randomized patients with POAF after cardiac surgery to rate control or rhythm control with amiodarone/cardioversion. We assessed subgroups of trial participants defined by heart failure/cardiomyopathy history or left ventricular ejection fraction (LVEF) < 50%. We conducted a stratified analysis in patients with and without HF to explore outcomes of rhythm versus rate control strategy. RESULTS: Of 523 subjects with POAF after cardiac surgery, 131 (25%) had HF. 49% of HF patients were randomized to rhythm control. In HF patients, rhythm control was associated with less atrial fibrillation within the first 7 days. There were no differences in rhythm at 30- and 60-day follow-up. In the HF group, there were significantly more subjects with AF < 48 hours in the rhythm control group compared to rate control group- 68.8% compared to 46.3%, P=0.009. By comparison, in the non-HF stratum, 54.4% of the rate control group had AF < 48 hours compared to 63.5% of the rhythm control group (P=0.067).), though there was no significant interaction of heart failure with cardiac rhythm at 7 days (Pinteraction 0.16). CONCLUSION: Rhythm control for HF patients with POAF after cardiac surgery increases early restoration of sinus rhythm. Rate and rhythm control are both reasonable for HF patients with AF after cardiac surgery.


Assuntos
Fibrilação Atrial , Procedimentos Cirúrgicos Cardíacos , Insuficiência Cardíaca , Fibrilação Atrial/diagnóstico , Fibrilação Atrial/epidemiologia , Fibrilação Atrial/etiologia , Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Insuficiência Cardíaca/epidemiologia , Insuficiência Cardíaca/etiologia , Frequência Cardíaca , Humanos , Volume Sistólico , Função Ventricular Esquerda
3.
Am Heart J ; 199: 181-191, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29754660

RESUMO

OBJECTIVES: To characterize patient profile and hemodynamic profile of those undergoing intra-aortic balloon pump (IABP) for cardiogenic shock and define predictors of hemodynamic failure of IABP support. BACKGROUND: Clinical characteristics of IABP support in cardiogenic shock not related to acute myocardial infarction (AMI) remain poorly characterized. METHODS: We retrospectively studied a cohort of 74 patients from 2010 to 2015 who underwent IABP insertion for cardiogenic shock complicating acute decompensated heart failure not due to AMI. RESULTS: In the overall cohort, which consisted primarily of patients with chronic systolic heart failure (89%), IABP significantly augmented cardiac index and lowered systemic vascular resistance (P<.05). Despite this improvement, 28% of these patients died (24%) or require urgent escalation in mechanical circulatory support (MCS) (4%). Multivariable regression revealed that baseline left ventricular cardiac power index (LVCPI), a measure of LV power output derived from cardiac index and mean arterial pressure (P=.01), and history of ischemic cardiomyopathy (P=.003) were significantly associated with the composite adverse-event endpoint of death or urgent MCS escalation. An IABP Failure risk score using baseline LVCPI <0.28 W/m2 and ischemic history predicted 28-day adverse events with excellent discrimination. CONCLUSION: Despite hemodynamic improvements with IABP support, patients with non-AMI cardiogenic shock still suffer poor outcomes. Patients with ischemic cardiomyopathy and low LVPCI fared significantly worse. These patients may warrant closer observation or earlier consideration of more advanced hemodynamic support.


Assuntos
Insuficiência Cardíaca/etiologia , Hemodinâmica/fisiologia , Balão Intra-Aórtico/efeitos adversos , Infarto do Miocárdio/complicações , Choque Cardiogênico/cirurgia , Falha de Equipamento , Feminino , Seguimentos , Insuficiência Cardíaca/fisiopatologia , Mortalidade Hospitalar/tendências , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/fisiopatologia , Estudos Retrospectivos , Choque Cardiogênico/complicações , Resultado do Tratamento , Estados Unidos/epidemiologia
4.
Crit Care Med ; 45(10): 1709-1717, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28777195

RESUMO

OBJECTIVE: Circulating cardiac troponin has been associated with adverse prognosis in the acute respiratory distress syndrome in small and single-center studies; however, comprehensive studies of myocardial injury in acute respiratory distress syndrome using modern high-sensitivity troponin assays, which can detect troponin at much lower circulating concentrations, have not been performed. DESIGN: We performed a prospective cohort study. SETTING: We included patients enrolled in previously completed trials of acute respiratory distress syndrome. PATIENTS: One thousand fifty-seven acute respiratory distress syndrome patients were included. INTERVENTIONS: To determine the association of circulating high-sensitivity troponin I (Abbott ARCHITECT), with acute respiratory distress syndrome outcomes, we measured high-sensitivity troponin I within 24 hours of intubation. The primary outcome was 60-day mortality. MEASUREMENTS AND MAIN RESULTS: Detectable high-sensitivity troponin I was present in 94% of patients; 38% of patients had detectable levels below the 99th percentile of a healthy reference population (26 ng/L), whereas 56% of patients had levels above the 99th percentile cut point. After multivariable adjustment, age, cause of acute respiratory distress syndrome, temperature, heart rate, vasopressor use, Sequential Organ Failure Assessment score, creatinine, and PCO2 were associated with higher high-sensitivity troponin I concentration. After adjustment for age, sex, and randomized trial assignment, the hazard ratio for 60-day mortality comparing the fifth to the first quintiles of high-sensitivity troponin I was 1.61 (95% CI, 1.11-2.32; p trend = 0.003). Adjusting for Sequential Organ Failure Assessment score suggested that this association was not independent of disease severity (hazard ratio, 0.95; 95% CI, 0.64-1.39; p = 0.93). CONCLUSIONS: Circulating troponin is detectable in over 90% of patients with acute respiratory distress syndrome and is associated with degree of critical illness. The magnitude of myocardial injury correlated with mortality.


Assuntos
Síndrome do Desconforto Respiratório/sangue , Síndrome do Desconforto Respiratório/mortalidade , Troponina I/sangue , Fatores Etários , Monóxido de Carbono/sangue , Estudos de Coortes , Creatinina/sangue , Feminino , Febre/epidemiologia , Frequência Cardíaca , Humanos , Masculino , Pessoa de Meia-Idade , Escores de Disfunção Orgânica , Prevalência , Prognóstico , Vasoconstritores/uso terapêutico
7.
Am Heart J ; 176: 114-21, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-27264228

RESUMO

With potent analgesic properties, perceived hemodynamic benefits and limited alternatives, morphine is the analgesic mainstay for patients with nitrate resistant chest pain due to acute Myocardial Infarction (MI). However, observational data suggest that morphine administration during MI may have negative consequences. While vomiting, hypotension and respiratory depression are established side effects, recent reports have demonstrated attenuated and delayed oral anti-platelet agent absorption, as well as suboptimal reperfusion after MI, all of which may translate into adverse cardiovascular outcomes. These data have resulted in reduced support for morphine in recent European and U.S. clinical practice guidelines for MI; despite the absence of any prospective randomized outcomes trials addressing this question. As such, randomized trials are now necessary to confirm whether or not morphine, which is administered in up to 30% of MI cases, causes adverse clinical outcomes in these patients. However, given that placebo-controlled randomized trial designs evaluating morphine in MI are limited by an ethical requirement for appropriate analgesia, alternative investigational approaches may be necessary. In this article we review the updated evidence for morphine in MI and outline novel strategies that may facilitate future investigation of this clinical dilemma.


Assuntos
Síndrome Coronariana Aguda/tratamento farmacológico , Morfina/farmacologia , Analgésicos Opioides/farmacologia , Humanos , Guias de Prática Clínica como Assunto , Resultado do Tratamento
8.
Circ Res ; 114(8): 1302-10, 2014 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-24565698

RESUMO

RATIONALE: Although accumulating data support the efficacy of intramyocardial cell-based therapy to improve left ventricular (LV) function in patients with chronic ischemic cardiomyopathy undergoing CABG, the underlying mechanism and impact of cell injection site remain controversial. Mesenchymal stem cells (MSCs) improve LV structure and function through several effects including reducing fibrosis, neoangiogenesis, and neomyogenesis. OBJECTIVE: To test the hypothesis that the impact on cardiac structure and function after intramyocardial injections of autologous MSCs results from a concordance of prorecovery phenotypic effects. METHODS AND RESULTS: Six patients were injected with autologous MSCs into akinetic/hypokinetic myocardial territories not receiving bypass graft for clinical reasons. MRI was used to measure scar, perfusion, wall thickness, and contractility at baseline, at 3, 6, and 18 months and to compare structural and functional recovery in regions that received MSC injections alone, revascularization alone, or neither. A composite score of MRI variables was used to assess concordance of antifibrotic effects, perfusion, and contraction at different regions. After 18 months, subjects receiving MSCs exhibited increased LV ejection fraction (+9.4 ± 1.7%, P=0.0002) and decreased scar mass (-47.5 ± 8.1%; P<0.0001) compared with baseline. MSC-injected segments had concordant reduction in scar size, perfusion, and contractile improvement (concordant score: 2.93 ± 0.07), whereas revascularized (0.5 ± 0.21) and nontreated segments (-0.07 ± 0.34) demonstrated nonconcordant changes (P<0.0001 versus injected segments). CONCLUSIONS: Intramyocardial injection of autologous MSCs into akinetic yet nonrevascularized segments produces comprehensive regional functional restitution, which in turn drives improvement in global LV function. These findings, although inconclusive because of lack of placebo group, have important therapeutic and mechanistic hypothesis-generating implications. CLINICAL TRIAL REGISTRATION URL: http://clinicaltrials.gov/show/NCT00587990. Unique identifier: NCT00587990.


Assuntos
Cardiomiopatias/terapia , Terapia Baseada em Transplante de Células e Tecidos/métodos , Ponte de Artéria Coronária , Transplante de Células-Tronco Mesenquimais/métodos , Isquemia Miocárdica/terapia , Miocárdio/patologia , Disfunção Ventricular Esquerda/terapia , Cicatriz/patologia , Cicatriz/terapia , Fibrose/patologia , Fibrose/terapia , Seguimentos , Humanos , Injeções , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Fenótipo , Estudos Prospectivos , Fatores de Tempo , Resultado do Tratamento
10.
Circulation ; 137(3): 307-309, 2018 01 16.
Artigo em Inglês | MEDLINE | ID: mdl-29046319
11.
Circ J ; 77(11): 2786-92, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23985963

RESUMO

BACKGROUND: Aspirin's therapeutic action is via inhibition of platelet cyclooxygenase 1 (COX-1) thromboxane A2 (TxA2) production. The aim of this study was to evaluate TxA2 production, in the absence of platelet COX-1 activity, in coronary atherosclerotic heart disease patients with and without atherothrombotic myocardial infarction (MI). METHODS AND RESULTS: TxA2 production, in the absence of platelet COX-1 activity, was evaluated in 44 patients taking aspirin on 3 commercially available assays that detect metabolites of TxA2 in the urine. Two assays measure urine 11-dehydro-thromboxane B2 (TxB2) alone and 1 measures urine 11-dehydro-TxB2 plus 11-dehydro-2,3-dinor-TxB2. Platelet COX-1 inhibition was confirmed on <10% platelet aggregation in response to ≥1 mmol/L arachidonic acid. Median urine 11-dehydro-TxB2 was no different in those with and without a diagnosis of atherothrombotic MI (325 vs. 311 pg/mg creatinine, P=0.59 via polyclonal ELISA) and (312 vs. 244 pg/mg creatinine, P=0.11 via LC-MS/MS). Median urine 11-dehydro-TxB2 plus 11-dehydro-2,3-dinor-TxB2, however, was higher in those with vs. those without a diagnosis of atherothrombotic MI (1,035 vs. 606 pg/mg creatinine, P=0.03 via monoclonal ELISA). CONCLUSIONS: Differences in TxA2 production, in the absence of platelet COX-1 activity, between those with vs. without atherothrombotic MI were not observed when TxA2 generation was assessed on 11-dehydro-TxB2 production alone (polyclonal ELISA or LC-MS/MS), but differences were observed when TxA2 generation was assessed using 11-dehydro-TxB2 plus 11-dehydro-2,3-dinor-TxB2 (monoclonal ELISA). These findings highlight important differences between different commercially available assays for TxA2 generation and suggest that 11-dehydro-2,3-dinor-TxB2 may be critical to the biology of atherothrombosis.


Assuntos
Plaquetas/enzimologia , Doença da Artéria Coronariana/sangue , Ciclo-Oxigenase 1/metabolismo , Infarto do Miocárdio/sangue , Trombose/sangue , Tromboxano A2/sangue , Idoso , Aspirina/administração & dosagem , Doença da Artéria Coronariana/tratamento farmacológico , Doença da Artéria Coronariana/urina , Creatinina/sangue , Creatinina/urina , Inibidores de Ciclo-Oxigenase/administração & dosagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/tratamento farmacológico , Infarto do Miocárdio/urina , Agregação Plaquetária/efeitos dos fármacos , Trombose/tratamento farmacológico , Trombose/urina , Tromboxano A2/urina , Tromboxano B2/análogos & derivados , Tromboxano B2/sangue , Tromboxano B2/urina
12.
JACC Adv ; 2(2)2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37168845

RESUMO

BACKGROUND: Physiologic changes in N-terminal pro-B-type natriuretic peptide (NT-proBNP) across trimesters of pregnancy have not been well studied. OBJECTIVES: The authors aimed to measure NT-proBNP in adult women, by pregnancy status and trimester, in a nationally representative sample from the National Health and Nutrition Examination Survey 1999 to 2004. METHODS: We conducted a cross-sectional analysis of 2,134 women (546 pregnant) aged 20 to 40 years without a history of cardiovascular disease. RESULTS: Among pregnant women in the first trimester, the prevalence of elevated NT-proBNP (>125 pg/mL) was 20.0% (SE, 6.6%) compared to 2.4% (SE, 0.8%) among women in the third trimester and 8.0% among nonpregnant women. After adjustment for demographics and cardiovascular risk factors, NT-proBNP was 44% higher (absolute difference 26.4 [95% CI: 11.2-41.6] pg/mL) in the first trimester of pregnancy compared to nonpregnant women. Among pregnant women only, adjusted NT-proBNP was 46% lower (absolute difference -22.2 [95% CI: -36.9 to -7.5] pg/mL) in women in the third trimester compared to women in the first trimester. NT-proBNP was inversely associated with body mass index and with systolic blood pressure. CONCLUSIONS: Women in the first trimester of pregnancy had significantly higher NT-proBNP than those in the third trimester and compared to similarly aged nonpregnant women. The dynamic nature of NT-proBNP should be taken into consideration when ordering NT-proBNP lab tests in pregnant women.

13.
Am J Physiol Heart Circ Physiol ; 302(1): H349-58, 2012 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-22003052

RESUMO

Effective arterial elastance(E(A)) is a measure of the net arterial load imposed on the heart that integrates the effects of heart rate(HR), peripheral vascular resistance(PVR), and total arterial compliance(TAC) and is a modulator of cardiac performance. To what extent the change in E(A) during exercise impacts on cardiac performance and aerobic capacity is unknown. We examined E(A) and its relationship with cardiovascular performance in 352 healthy subjects. Subjects underwent rest and exercise gated scans to measure cardiac volumes and to derive E(A)[end-systolic pressure/stroke volume index(SV)], PVR[MAP/(SV*HR)], and TAC(SV/pulse pressure). E(A) varied with exercise intensity: the ΔE(A) between rest and peak exercise along with its determinants, differed among individuals and ranged from -44% to +149%, and was independent of age and sex. Individuals were separated into 3 groups based on their ΔE(A)I. Individuals with the largest increase in ΔE(A)(group 3;ΔE(A)≥0.98 mmHg.m(2)/ml) had the smallest reduction in PVR, the greatest reduction in TAC and a similar increase in HR vs. group 1(ΔE(A)<0.22 mmHg.m(2)/ml). Furthermore, group 3 had a reduction in end-diastolic volume, and a blunted increase in SV(80%), and cardiac output(27%), during exercise vs. group 1. Despite limitations in the Frank-Starling mechanism and cardiac function, peak aerobic capacity did not differ by group because arterial-venous oxygen difference was greater in group 3 vs. 1. Thus the change in arterial load during exercise has important effects on the Frank-Starling mechanism and cardiac performance but not on exercise capacity. These findings provide interesting insights into the dynamic cardiovascular alterations during exercise.


Assuntos
Exercício Físico/fisiologia , Hemodinâmica , Modelos Cardiovasculares , Contração Muscular , Músculo Esquelético/irrigação sanguínea , Adulto , Idoso , Análise de Variância , Artérias/fisiologia , Baltimore , Pressão Sanguínea , Débito Cardíaco , Complacência (Medida de Distensibilidade) , Teste de Esforço , Feminino , Frequência Cardíaca , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Volume Sistólico , Fatores de Tempo , Resistência Vascular , Função Ventricular Esquerda
14.
Methodist Debakey Cardiovasc J ; 18(3): 14-23, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35734150

RESUMO

Maternal mortality is rising in the United States, and cardiovascular disease is the leading cause. Adverse pregnancy outcomes such as preeclampsia and gestational diabetes heighten the risk of cardiovascular complications during pregnancy and the peripartum period and are associated with long-term cardiovascular risks. The field of cardio-obstetrics is a subspecialty within adult cardiology that focuses on the management of women with or at high risk for heart disease who are considering pregnancy or have become pregnant. There is growing recognition of the need for more specialists with dedicated expertise in cardio-obstetrics to improve the cardiovascular care of this high-risk patient population. Current recommendations for cardiovascular fellowship training programs accredited by the Accreditation Council for Graduate Medical Education involve establishing core competency in the knowledge of managing heart disease in pregnancy. However, little granular detail is available of what such training should entail, which can lead to knowledge gaps. Additionally, dedicated advanced subspecialty training in this area is not commonly offered. Multidisciplinary collaborative teams have been shown to improve outcomes in cardiac patients during pregnancy, and cardiovascular fellows-in-training interested in cardio-obstetrics should have the opportunity to participate in and contribute to a pregnancy heart team. In this document, we describe a proposed specialized cardio-obstetrics training pathway that could serve to adequately prepare trainees to competently and comprehensively care for women with cardiovascular disease before, during, and after pregnancy.


Assuntos
Doenças Cardiovasculares , Cardiopatias , Obstetrícia , Adulto , Doenças Cardiovasculares/diagnóstico , Doenças Cardiovasculares/terapia , Currículo , Educação de Pós-Graduação em Medicina , Bolsas de Estudo , Feminino , Humanos , Gravidez , Estados Unidos
15.
ESC Heart Fail ; 9(5): 2918-2927, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35712815

RESUMO

AIMS: Atrial fibrillation (AF) is a common comorbid condition in heart failure with preserved ejection fraction (HFpEF). The effect of AF on heart failure (HF) exacerbation in HFpEF has not been well described. This study investigated how AF modifies the clinical trajectory of HFpEF patients after hospitalization for decompensated HF. METHODS AND RESULTS: We stratified HFpEF subjects by AF diagnosis and performed longitudinal analysis to compare risk for HF hospitalization after index hospitalization for decompensated HF. All-cause mortality, 30 day all-cause readmissions, and response to inpatient diuresis were also evaluated. Of 90 subjects enrolled, 35.6% (n = 32) had AF. Subjects with AF were older (72.5 vs. 60.5 years; P < 0.01), more often male (46.9% vs. 24.1%; P = 0.03), and had greater left atrial diameter (4.9 vs. 3.8 cm; P < 0.01) compared with those without AF. Subjects with AF had a higher risk for HF hospitalization than their counterparts without AF (P = 0.02); this relationship remained significant following multivariable competing risk regression with propensity score weighting (hazard ratio 2.53, P = 0.04 and hazard ratio 2.91, P = 0.04, with overlap and inverse probability weighting, respectively). Although having AF appeared to increase the risk of all-cause hospital readmission within 30 days of discharge (37.5% vs. 17.5%; P = 0.036), this relationship failed to remain significant following propensity score adjustment for clinical covariates. CONCLUSIONS: Atrial fibrillation is an independent risk factor for HF rehospitalization in HFpEF. Further understanding of the interplay between AF and HFpEF will be critical to guide the selection of appropriate rhythm management strategies in this population.


Assuntos
Fibrilação Atrial , Insuficiência Cardíaca , Humanos , Masculino , Fibrilação Atrial/complicações , Fibrilação Atrial/epidemiologia , Fibrilação Atrial/diagnóstico , Insuficiência Cardíaca/complicações , Insuficiência Cardíaca/epidemiologia , Insuficiência Cardíaca/diagnóstico , Volume Sistólico/fisiologia , Prognóstico , Fatores de Risco , Hospitalização
16.
Front Med (Lausanne) ; 9: 876046, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35770004

RESUMO

Background: Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a serine protease that is a mediator of the immune response to sepsis. PCSK9 is also highly expressed in pneumocytes and pulmonary endothelial cells. We hypothesized that serum PCSK9 levels would be associated with death and ICU outcomes in patients with ARDS. Methods: Using data and plasma samples from the NIH BioLINCC data repository, we assembled a cohort of 1,577 patients with the acute respiratory distress syndrome (ARDS) enrolled in two previously completed clinical trials, EDEN and SAILS. We measured PCSK9 levels in plasma within 24 h of intubation using commercially available ELISA kits (R&D Systems). We assessed the association of PCSK9 with mortality using Cox proportional hazard models. We also assessed clinical factors associated with PCSK9 level and the association of PCSK9 with the number of days free of mechanical ventilation and days free of ICU care. Results: In 1,577 ARDS patients, median age was 53 years (IQR 42-65 years) and median APACHE III score 91 (72-111) connoting moderate critical illness. PCSK9 levels were 339.3 ng/mL (IQR 248.0-481.0). In multivariable models, race, cause of ARDS, body mass index, pre-existing liver disease, body temperature, sodium, white blood cell count and platelet count were associated with PCSK9 level. Presence of sepsis, use of vasopressors and ventilator parameters were not associated with PCSK9 level. PCSK9 levels were not associated with in-hospital mortality (HR per IQR 0.96, 95% CI 0.84-1.08, P = 0.47). Higher PCSK9 levels were associated with fewer ICU and ventilator free days. Conclusions: Plasma PCSK9 is not associated with mortality in ARDS, however higher PCSK9 levels are associated with secondary outcomes of fewer ICU free and ventilator free days. Clinical factors associated with PCSK9 in ARDS are largely unmodifiable. Further research to define the mechanism of this association is warranted.

17.
Am J Cardiol ; 171: 1-6, 2022 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-35314069

RESUMO

Lipoprotein(a), or Lp(a), levels and the effect of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibition on Lp(a) during the peri-infarction and early postinfarction period are not well characterized. This study aimed to describe the trajectory of Lp(a), as well as the effect of PCSK9 inhibition on that trajectory during the peri-infarction and early postinfarction period. Lp(a) levels were obtained within 24 hours of hospital admission as well as within 24 hours of hospital discharge and at 30 days from 74 participants who presented with a NSTEMI (troponin I >5 ng/ml) or with a STEMI and were enrolled in 2 randomized, double-blind trials of evolocumab and placebo (Evolocumab in Acute Coronary Syndrome [EVACS I]; ClinicalTrials.gov, NCT03515304 and Evolocumab in Patients With STEMI [EVACS II]; ClinicalTrials.gov Identifier: NCT04082442). There was a significant increase from the pretreatment level in the placebo-treated patients, from 64 (41,187) nmol/L to 80 (47, 172) nmol/L at hospital discharge and to 82 (37, 265) at 30 days. This was primarily driven by the results from participants with high Lp(a) at hospital admission (>75 nmol/L) in whom the median increase was 28% as compared with a 10% increase in those with pretreatment Lp(a) of <75 nmol/L. In contrast, there was no significant change from the pretreatment level in the evolocumab-treated patients regardless of pretreatment Lp(a) levels. In conclusion, Lp(a) rises during the peri-infarction and early postinfarction period in patients with acute myocardial infarction. The increase was prevented by a single dose of subcutaneous evolocumab given within 24 hours of hospital admission.


Assuntos
Anticolesterolemiantes , Infarto do Miocárdio com Supradesnível do Segmento ST , Anticolesterolemiantes/uso terapêutico , LDL-Colesterol , Humanos , Lipoproteína(a) , Pró-Proteína Convertase 9 , Ensaios Clínicos Controlados Aleatórios como Assunto , Infarto do Miocárdio com Supradesnível do Segmento ST/tratamento farmacológico , Subtilisina
18.
Am J Physiol Heart Circ Physiol ; 300(5): H1914-22, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21378146

RESUMO

The coupling between arterial elastance (E(A); net afterload) and left ventricular elastance (E(LV); pump performance), known as E(A)/E(LV), is a key determinant of cardiovascular performance and shifts during exercise due to a greater increase in E(LV) versus E(A). This normal exercise-induced reduction in E(A)/E(LV) decreases with advancing age. We hypothesized that sodium nitroprusside (SNP) can acutely ameliorate the age-associated deficits in E(A)/E(LV). At rest and during graded exercise to exhaustion, E(A) was characterized as end-systolic pressure/stroke volume and E(LV) as end-systolic pressure/end-systolic volume. Resting E(A)/E(LV) did not differ between old (70 ± 8 yr, n = 15) and young (30 ± 5 yr, n = 17) subjects because of a tandem increase in E(A) and E(LV) in older subjects. During peak exercise, a blunted increase in E(LV) in old (7.8 ± 3.1 mmHg/ml) versus young (11.4 ± 6.5 mmHg/ml) subjects blunted the normal exercise-induced decline in E(A)/E(LV) in old (0.25 ± 0.11) versus young (0.16 ± 0.05) subjects. SNP administration to older subjects lowered resting E(A)/E(LV) by 31% via a reduction in E(A) (10%) and an increase in E(LV) (47%) and lowered peak exercise E(A)/E(LV) (36%) via an increase in E(LV) (68%) without a change in E(A). Importantly, SNP attenuated the age-associated deficits in E(A)/E(LV) and E(LV) during exercise, and at peak exercise E(A)/E(LV) in older subjects on drug administration did not differ from young subjects without drug administration. In conclusion, some age-associated deficiencies in E(A)/E(LV), E(A), and E(LV), in older subjects can be acutely abolished by SNP infusion. This is relevant to common conditions in older subjects associated with a significant impairment of exercise performance such as frailty or heart failure with preserved ejection fraction.


Assuntos
Vasos Coronários/fisiologia , Elasticidade/fisiologia , Acoplamento Excitação-Contração/efeitos dos fármacos , Acoplamento Excitação-Contração/fisiologia , Coração/fisiologia , Nitroprussiato/farmacologia , Função Ventricular Esquerda/fisiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Envelhecimento/fisiologia , Pressão Sanguínea/fisiologia , Eletrocardiografia , Exercício Físico/fisiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Descanso/fisiologia , Volume Sistólico/fisiologia , Vasodilatadores/farmacologia
19.
Cardiovasc Drugs Ther ; 25(3): 251-8, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21626217

RESUMO

PURPOSE: Prior studies demonstrate an association between specific beta-adrenergic receptor (ß-AR) polymorphisms and clinical outcomes in patients with chronic heart failure and following acute coronary syndromes. The underlying mechanism may be due to differences in left ventricular remodeling. This study was undertaken to explore the relationship between LV remodeling after myocardial infarction and polymorphisms in the cardiac ß1-AR and ß2-AR genes. METHODS: After first ST-segment elevation myocardial infarction (STEMI), 122 patients on chronic ß1 receptor antagonist therapy underwent baseline and 6-month LV volume evaluation. We assessed the relationships between changes in LV volumes and the polymorphisms in ß1-AR, ß1-Arg389Gly and ß1-Ser49Gly, and in ß2-AR, ß2-Gly16Arg and ß2-Gln27Glu. RESULTS: We found that patients homozygous for the ß2-Glu27 variant were 5.2 times more likely to be in the group with the highest end systolic volume (ESV) progression (OR 5.2, 95%CI 1.4-19.0). They were also more likely to have the largest progression of end diastolic volume (EDV) and decrease in LV ejection fraction (LVEF). For those with baseline LV dysfunction, being homozygous for Arg at amino acid position 389 in ß1-AR was associated with decreases in ESV (-46 mL, CI -3.1, -88) and EDV (-40 mL, CI -1.1, -79) and an increase in LVEF (11%, CI 0.3, 22). CONCLUSION: We found that polymorphisms of the ß1-AR and ß2-AR genes are associated with differential LV remodeling in patients treated with a ß1 receptor antagonist following STEMI.


Assuntos
Infarto do Miocárdio/fisiopatologia , Receptores Adrenérgicos beta 1/genética , Receptores Adrenérgicos beta 2/genética , Remodelação Ventricular/genética , Antagonistas de Receptores Adrenérgicos beta 1/farmacologia , Idoso , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/genética , Polimorfismo de Nucleotídeo Único , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos Retrospectivos , Disfunção Ventricular Esquerda/genética , Disfunção Ventricular Esquerda/fisiopatologia
20.
Am Heart J Plus ; 72021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35024645

RESUMO

The prevalence of sepsis is increasing in subspecialty intensive care units, including the cardiac intensive care unit (CICU). The clinical characteristics and outcomes of CICU patients with sepsis are not well understood. We conducted a retrospective cohort study of sepsis patients in the CICU compared to other ICUs using the PROGRESS registry. CICU-sepsis patients were older with fewer acute organ failures (median 2 v. 3, p < 0.001), lower SOFA scores (median 7 v. 9, p < 0.001), and more comorbidities. The use of fluid resuscitation, mechanical ventilation, and renal replacement were similar. Mortality was 47.3% for CICU-sepsis patients compared to 43.6% for sepsis patients in other ICU (P = 0.37). We conclude that, in a prior cohort of septic patients, sepsis in CICU patients had outcomes that are comparably poor to sepsis in other ICUs. Septic CICU patients presented with fewer acute organ failures, but more chronic comorbidities. Contemporary data as well as novel interventions and investigations targeted specifically to cardiac patients with sepsis should be prioritized.

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