Impact of preeclampsia on ventricular repolarization indices.

BACKGROUND: Because of cardiac hypertrophy and electrophysiological alterations associated with preeclampsia, worsening of preexisting arrhythmias or occurrence of de novo arrhythmias are common in patients with preeclampsia. Tp-e/QT and Tpe/QTc ratios are accepted as reliable indexes for predicting ventricular arrhythmias. In this study, we examined the impact of preeclampsia on ventricular repolarization indices in patients with preeclampsia by using the QT, QTc and Tp-e interval, Tp-e/QTratio, and Tp-e/QTc ratio. METHODS: We analyzed electrocardiographic recordings of sixty pregnant women with preeclampsia and thirty age-matched healthy pregnant women. Women presenting with preeclampsia were divided into 2 groups and classified as early (gestational age < 34 weeks at clinical onset) or late (≥34 weeks) onset preeclampsia. Ventricular repolarization indices were evaluated. RESULTS: The QT and Tp-e intervals were found to be longer in patients with earlyonset preeclampsia compared to patients with late-onset preeclampsia and helthy pregnants (377.6 ± 23 ms vs 374.3 ± 15 ms, 362 ± 15 ms & 82.6 ± 9.4 ms vs 74.0 ± 10.6 ms, 68.6 ± 10 ms). In adition, Tp-e/QT and Tp-e/QTc ratio were significantly higher in this patient population compared to others (0.21 ± 0.02 vs 0.19 ± 0.02, 0.18 ± 0.02 & 0.19 ± 0.02 vs 0.16 ± 0.02, 0.15 ± 0,02, p < 0.05 respectively). CONCLUSION: Our data showed that preeclampsia has unfavorable effects on electrocardiographic indices of ventricular repolarization compared to healthy pregnant women. This effect is more prominent in patients with early-onset preeclampsia.

Effect of serum uric acid on the positive predictive value of dobutamine stress echocardiography.

There is controversial data regarding the relationship between uric acid (UA) and coronary artery disease and cardiovascular events. Despite the deleterious effects of hyperuricemia on endothelial function, the effect of UA on myocardial ischemia has not been previously studied. We aimed to investigate the relationship between UA and myocardial ischemia that was identified using dobutamine stress echocardiography (DSE). In this retrospective study, the laboratory and DSE reports of 548 patients were reviewed. The patients were divided into two groups based on the presence of ischemia and further subdivided into three groups according to the extent of ischemia (none, ischemia in 1-3 segments, ischemia in >3 segments). Serum UA levels were compared. Determinants of ischemia were assessed using a regression model. UA was increased in patients with ischemia and was correlated with the number of ischemic segments (p < 0.001). A cutoff value of UA > 5 mg/dl had 63.9 % sensitivity, 62.0 % specificity, 42.5 % positive predictive value (PPV), and 79.6 % negative predictive value for ischemia. When the positive DSE exams were further sorted according to the UA cutoff, the PPV of DSE increased from 80.2 to 94.0 %. Uric acid (odds ratio 1.51; 95 % CI 1.14-1.99), diabetes mellitus, HDL and glomerular filtration rate were found to be independent determinants of myocardial ischemia in DSE. Increased UA is associated with both the presence and extent of DSE-identified myocardial ischemia. A UA cutoff may be a good method to improve the PPV of DSE.

Diastolic Strain Parameters are Associated with Short Term Mortality and Rehospitalization in Patients with Advanced Heart Failure. / Parâmetros de Strain Diastólico Estão Associados à Mortalidade em Curto Prazo e à Reinternação em Pacientes com Insuficiência Cardíaca Avançada.

BACKGROUND: Heart failure (HF) is a leading cause of hospitalization and mortality worldwide and places a great economic burden on healthcare systems. Identification of prognostic factors in HF patients is of great importance to establish optimal management strategies and to avoid unnecessary invasive and costly procedures in end-stage patients. OBJECTIVES: In the current study, we aimed to investigate the association between diastolic strain parameters including E/e' SR, and short-term outcomes in advanced HF patients. METHODS: The population study included 116 advanced HF with reduced ejection fraction (HFrEF) patients. Clinical, laboratory, and echocardiographic evaluations of the patients were performed within the first 24 hours of hospital admission. Patients were followed for one month and any re-hospitalization due to worsening of HF symptoms and any mortality was recorded. The level of significance adopted in the statistical analysis was 5%. RESULTS: E/e' SR was significantly higher in the patient group compared to the control group (p=0.001). During one-month follow-up, 13.8% of patients died and 37.1% of patients were rehospitalized. Serum NT-ProBNP (p=0.034) and E/e' SR (p=0.033) were found to be independent predictors of mortality and ACEI use (p=0.027) and apical 3C strain (p=0.011) were found to be independent predictors of rehospitalization in the patient group. CONCLUSION: Findings of the current prospective study demonstrate that E/e' SR measured by speckle tracking echocardiography is an independent and sensitive predictor of short-term mortality in advanced HFrEF patients and may have a role in the identification of end-stage HFrEF patients.

FUNDAMENTO: A insuficiência cardíaca é uma das principais causas de hospitalização e mortalidade em todo o mundo e representa um grande fardo económico para os sistemas de saúde. A identificação de fatores prognósticos em pacientes com IC é de grande importância para estabelecer estratégias de manejo ideais e evitar procedimentos invasivos e dispendiosos desnecessários em pacientes em estágio terminal. OBJETIVOS: No presente estudo, nosso objetivo foi investigar a associação entre parâmetros de strain diastólico, incluindo E/e' SR, e resultados de curto prazo em pacientes com IC avançada. MÉTODOS: O estudo populacional incluiu 116 pacientes com insuficiência cardíaca avançada com fração de ejeção reduzida (ICFEr) avançada. Avaliações clínicas, laboratoriais e ecocardiográficas dos pacientes foram realizadas nas primeiras 24 horas de internação. Os pacientes foram acompanhados por um mês e qualquer reinternação por piora dos sintomas de IC e qualquer mortalidade foi registrada. O nível de significância adotado na análise estatística foi de 5%. RESULTADOS: A E/e' SR foi significativamente maior no grupo de pacientes em comparação ao grupo controle (p=0,001). Durante o acompanhamento de um mês, 13,8% dos pacientes morreram e 37,1% dos pacientes foram reinternados. NT-ProBNP sérico (p=0,034) e E/e' SR (p=0,033) foram considerados preditores independentes de mortalidade e o uso de IECA (p=0,027) e strain 3C apical (p=0,011) foram considerados independentes preditores de reinternação no grupo de pacientes. CONCLUSÃO: Os resultados do presente estudo prospectivo demonstram que a E/e' SR medida pela ecocardiografia com speckle tracking é um preditor independente e sensível de mortalidade em curto prazo em pacientes com ICFEr avançada e pode ter um papel na identificação de pacientes com ICFEr em estágio terminal.

Scanning of paroxysmal atrial fibrillation as an etiological risk factor in patients with acute ischemic stroke: prospective study.

BACKGROUND: Prevention of recurrence of stroke depends on recognition of the underlying mechanism of ischemia. OBJECTIVE: To screen patients who were hospitalized with diagnosis of acute ischemic stroke in terms of atrial fibrillation (AF) with repeated Holter electrocardiography recordings. DESIGN AND SETTING: Prospective study conducted at Konya Education and Research Hospital, Turkey. METHODS: Patients with a diagnosis of acute ischemic stroke, without atrial fibrillation on electrocardiography (ECG), were evaluated. Their age, gender, histories of previous ischemic attack, occurrences of paroxysmal atrial fibrillation (PAF) and other risks were assessed during the first week after acute ischemic stroke and one month thereafter. ECG recordings were obtained from 130 patients through 24-hour ambulatory Holter. Patients without PAF attack during the first Holter were re-evaluated. RESULTS: PAF was detected through the first Holter in 33 (25.4%) out of 130 acute ischemic stroke patients. A second Holter was planned for 97 patients: 53 (54.6%) of them could not attend due to COVID-19 pandemic; while 44 (45.3%) patients had the second Holter and, among these, 4 (9.1%) had PAF. The only parameter associated with PAF was older age. Four (10.8%) of the 37 patients with PAF had also symptomatic carotid stenosis. CONCLUSIONS: Detecting the presence of PAF by screening patients with no AF in the ECG through Holter ECG examinations is valuable in terms of changing the course of the treatment. It should be kept in mind that the possibility of accompanying PAF cannot be ruled out in the presence of other factors that pose a risk of stroke.

Index of cardiac-electrophysiological balance and the effects of thrombolytic therapy on the electrocardiogram of patients with pulmonary embolism.

OBJECTIVE: Different parameters on electrocardiograms (ECG) have been investigated to predict arrhythmia and mortality in patients with acute pulmonary embolism (APE). The acute effect of thrombolytic therapy (TT) on these parameters has not been investigated yet. METHODS: We examined the data of 83 patients who were evaluated as high-risk APE and discharged from the hospital after TT. First, the high-risk APE patients' ECGs were compared with healthy control subjects (n = 55). After their admission and 24 hours later, the ECGs of patients with APE were compared. Heart rate, P-wave morphology, QRS duration, QT distance, Tp-e, and the index of cardiac electrophysiological balance (iCEB) were analyzed. RESULTS: Although P maximum was not different between the groups' ECGs, heart rate, QT, QTc (corrected QT) interval, Tp-e intervals, Tp-e/QT ratio, and P wave dispersion were significantly higher in the APE group ( P values < 0.031). iCEB or iCEBc (corrected iCEB) values were lower in APE group ( P < 0.001). After TT, we determined a decrease in heart rate, Tp-e interval, and Tp-e/QT ratio ( P < 0.001). Although we detected a decrease in the QT and QTc interval and QT dispersion (QTd), QTd had no statistical significance (respectively P -value 0.013, 0.029, and 0.096). The iCEB and iCEBc levels were lower after TT ( P -value was 0.035 and 0.044 respectively). CONCLUSION: The QT, QTc, Tp-e interval, Tp-e/QTc ratio, iCEB, and iCEBc values significantly decreased after TT. It may be thought that effective TT causes partial improvement in ventricular repolarization in an early period.

Parâmetros de Strain Diastólico Estão Associados à Mortalidade em Curto Prazo e à Reinternação em Pacientes com Insuficiência Cardíaca Avançada / Diastolic Strain Parameters are Associated with Short Term Mortality and Rehospitalization in Patients with Advanced Heart Failure

Resumo Fundamento A insuficiência cardíaca é uma das principais causas de hospitalização e mortalidade em todo o mundo e representa um grande fardo económico para os sistemas de saúde. A identificação de fatores prognósticos em pacientes com IC é de grande importância para estabelecer estratégias de manejo ideais e evitar procedimentos invasivos e dispendiosos desnecessários em pacientes em estágio terminal. Objetivos No presente estudo, nosso objetivo foi investigar a associação entre parâmetros de strain diastólico, incluindo E/e' SR, e resultados de curto prazo em pacientes com IC avançada. Métodos O estudo populacional incluiu 116 pacientes com insuficiência cardíaca avançada com fração de ejeção reduzida (ICFEr) avançada. Avaliações clínicas, laboratoriais e ecocardiográficas dos pacientes foram realizadas nas primeiras 24 horas de internação. Os pacientes foram acompanhados por um mês e qualquer reinternação por piora dos sintomas de IC e qualquer mortalidade foi registrada. O nível de significância adotado na análise estatística foi de 5%. Resultados A E/e' SR foi significativamente maior no grupo de pacientes em comparação ao grupo controle (p=0,001). Durante o acompanhamento de um mês, 13,8% dos pacientes morreram e 37,1% dos pacientes foram reinternados. NT-ProBNP sérico (p=0,034) e E/e' SR (p=0,033) foram considerados preditores independentes de mortalidade e o uso de IECA (p=0,027) e strain 3C apical (p=0,011) foram considerados independentes preditores de reinternação no grupo de pacientes. Conclusão Os resultados do presente estudo prospectivo demonstram que a E/e' SR medida pela ecocardiografia com speckle tracking é um preditor independente e sensível de mortalidade em curto prazo em pacientes com ICFEr avançada e pode ter um papel na identificação de pacientes com ICFEr em estágio terminal.

Abstract Background Heart failure (HF) is a leading cause of hospitalization and mortality worldwide and places a great economic burden on healthcare systems. Identification of prognostic factors in HF patients is of great importance to establish optimal management strategies and to avoid unnecessary invasive and costly procedures in end-stage patients. Objectives In the current study, we aimed to investigate the association between diastolic strain parameters including E/e' SR, and short-term outcomes in advanced HF patients. Methods The population study included 116 advanced HF with reduced ejection fraction (HFrEF) patients. Clinical, laboratory, and echocardiographic evaluations of the patients were performed within the first 24 hours of hospital admission. Patients were followed for one month and any re-hospitalization due to worsening of HF symptoms and any mortality was recorded. The level of significance adopted in the statistical analysis was 5%. Results E/e' SR was significantly higher in the patient group compared to the control group (p=0.001). During one-month follow-up, 13.8% of patients died and 37.1% of patients were rehospitalized. Serum NT-ProBNP (p=0.034) and E/e' SR (p=0.033) were found to be independent predictors of mortality and ACEİ use (p=0.027) and apical 3C strain (p=0.011) were found to be independent predictors of rehospitalization in the patient group. Conclusion Findings of the current prospective study demonstrate that E/e' SR measured by speckle tracking echocardiography is an independent and sensitive predictor of short-term mortality in advanced HFrEF patients and may have a role in the identification of end-stage HFrEF patients.

Scanning of paroxysmal atrial fibrillation as an etiological risk factor in patients with acute ischemic stroke: prospective study

Abstract BACKGROUND: Prevention of recurrence of stroke depends on recognition of the underlying mechanism of ischemia. OBJECTIVE: To screen patients who were hospitalized with diagnosis of acute ischemic stroke in terms of atrial fibrillation (AF) with repeated Holter electrocardiography recordings. DESIGN AND SETTING: Prospective study conducted at Konya Education and Research Hospital, Turkey. METHODS: Patients with a diagnosis of acute ischemic stroke, without atrial fibrillation on electrocardiography (ECG), were evaluated. Their age, gender, histories of previous ischemic attack, occurrences of paroxysmal atrial fibrillation (PAF) and other risks were assessed during the first week after acute ischemic stroke and one month thereafter. ECG recordings were obtained from 130 patients through 24-hour ambulatory Holter. Patients without PAF attack during the first Holter were re-evaluated. RESULTS: PAF was detected through the first Holter in 33 (25.4%) out of 130 acute ischemic stroke patients. A second Holter was planned for 97 patients: 53 (54.6%) of them could not attend due to COVID-19 pandemic; while 44 (45.3%) patients had the second Holter and, among these, 4 (9.1%) had PAF. The only parameter associated with PAF was older age. Four (10.8%) of the 37 patients with PAF had also symptomatic carotid stenosis. CONCLUSIONS: Detecting the presence of PAF by screening patients with no AF in the ECG through Holter ECG examinations is valuable in terms of changing the course of the treatment. It should be kept in mind that the possibility of accompanying PAF cannot be ruled out in the presence of other factors that pose a risk of stroke.

Index of cardiac-electrophysiological balance and the effects of thrombolytic therapy on the electrocardiogram of patients with pulmonary embolism

SUMMARY OBJECTIVE: Different parameters on electrocardiograms (ECG) have been investigated to predict arrhythmia and mortality in patients with acute pulmonary embolism (APE). The acute effect of thrombolytic therapy (TT) on these parameters has not been investigated yet. METHODS: We examined the data of 83 patients who were evaluated as high-risk APE and discharged from the hospital after TT. First, the high-risk APE patients' ECGs were compared with healthy control subjects (n = 55). After their admission and 24 hours later, the ECGs of patients with APE were compared. Heart rate, P-wave morphology, QRS duration, QT distance, Tp-e, and the index of cardiac electrophysiological balance (iCEB) were analyzed. RESULTS: Although P maximum was not different between the groups' ECGs, heart rate, QT, QTc (corrected QT) interval, Tp-e intervals, Tp-e/QT ratio, and P wave dispersion were significantly higher in the APE group ( P values < 0.031). iCEB or iCEBc (corrected iCEB) values were lower in APE group ( P < 0.001). After TT, we determined a decrease in heart rate, Tp-e interval, and Tp-e/QT ratio ( P < 0.001). Although we detected a decrease in the QT and QTc interval and QT dispersion (QTd), QTd had no statistical significance (respectively P -value 0.013, 0.029, and 0.096). The iCEB and iCEBc levels were lower after TT ( P -value was 0.035 and 0.044 respectively). CONCLUSION: The QT, QTc, Tp-e interval, Tp-e/QTc ratio, iCEB, and iCEBc values significantly decreased after TT. It may be thought that effective TT causes partial improvement in ventricular repolarization in an early period.

RESUMO OBJETIVO: Diferentes parâmetros de eletrocardiograma (ECG) têm sido investigados para predizer mortalidade e arritmia em pacientes com embolia pulmonar aguda (EPA). O efeito agudo da terapia trombolítica (TT) nesses parâmetros ainda não foi investigado. MÉTODOS: Examinamos os dados de 83 pacientes avaliados com EPA de alto risco e que receberam alta hospitalar após TT. Primeiramente, comparamos os ECGs dos pacientes com EPA de alto risco com os de indivíduos saudáveis (n = 55). Os ECGs dos pacientes com EPA foram comparados logo após a internação e 24 horas mais tarde. A frequência cardíaca, a morfologia da onda P, a duração do QRS, o intervalo QT, Tp-e e o índice de equilíbrio eletrofisiológico cardíaco (iCEB) foram analisados. RESULTADOS: Embora o valor máximo de P não tenha sido diferente entre os grupos no ECG, a frequência cardíaca, QT, intervalo QTc (QT corrigido), intervalos Tpe, razão TP-e/QT e dispersão da onda P foram significativamente mais elevados no grupo de EPA (valores de P < 0,031). Os valores do iCEB ou iCEBc (iCEB corrigido) foram inferiores no grupo de APE (P < 0,001). Após a TT, observamos uma diminuição da frequência cardíaca, do intervalo TP-e e da razão TP-e/QT ( P < 0,001). Apesar de termos observado uma diminuição do intervalo QT e QTc e da dispersão do QT (QTd), o valor de QTd não apresentou uma diferença estatisticamente significativa (respectivamente, valor de P 0,013, 0,029 e 0,096). Os níveis do iCEB e iCEBc foram menores após a TT (valor de P 0,035 e 0,044, respectivamente). CONCLUSÃO: Os valores de QT, QTc, intervalo Tp-e, razão Tp-e/QTc, iCEB e iCEBc diminuíram significativamente após TT. Pode-se concluir que a TT eficaz causa uma melhora parcial da repolarização ventricular no período inicial.