scholarly journals 2363

2017 ◽  
Vol 1 (S1) ◽  
pp. 36-36
Author(s):  
Leo Buckley ◽  
Justin Canada ◽  
Salvatore Carbone ◽  
Cory Trankle ◽  
Michele Mattia Viscusi ◽  
...  
Keyword(s):  
Heart Failure ◽  
Blood Pressure ◽  
Stroke Volume ◽  
Systolic Pressure ◽  
Left Ventricular ◽  
Volume Index ◽  
Stroke Work ◽  
Systolic Volume ◽  
Arterial Blood ◽  
End Systolic Volume

OBJECTIVES/SPECIFIC AIMS: Our goal was to compare the ventriculo-arterial coupling and left ventricular mechanical work of patients with systolic and diastolic heart failure (SHF and DHF). METHODS/STUDY POPULATION: Patients with New York Heart Association Functional Class II-III HF symptoms were included. SHF was defined as left ventricular (LV) ejection fraction<50% and DHF as >50%. Analysis of the fingertip arterial blood pressure tracing captured with a finger plethysmography cuff according to device-specific algorithms provided brachial artery blood pressure and stroke volume. LV end-systolic volume was measured separately via transthoracic echocardiography. Arterial elastance (Ea), a measure of pulsatile and nonpulsatile LV afterload, was calculated as LV end-systolic pressure (ESP)/end-diastolic volume. End-systolic elastance (Ees), a measure of load-independent LV contractility, was calculated as LV ESP/end-systolic volume. Ventriculo-arterial coupling (VAC) ratio was defined as Ea/Ees. Stroke work (SWI) was calculated as stroke volume index×LV end-systolic pressure×0.0136 and potential energy index (PEI) as 1/2×(LV end-systolic volume×LV end-systolic pressure×0.0136). Total work index (TWI) was the sum of SWI+PEI. RESULTS/ANTICIPATED RESULTS: Patients with SHF (n=52) and DHF (n=29) were evaluated. Median (IQR) age was 57 (51–64) years. There were 48 (58%) and 59 (71%) patients were male and African American, respectively. Cardiac index was 2.8 (2.2–3.2) L/minute and 3.0 (2.8–3.3) L/minute in SHF and DHF, respectively (p=0.12). Self-reported activity levels (Duke Activity Status Index, p=0.48) and heart failure symptoms (Minnesota Living with Heart Failure Questionnaire, p=0.55) were not different between SHF and DHF. Ea was significantly lower in DHF compared with SHF patients [1.3 (1.2–1.6) vs. 1.7 (1.4–2.0) mmHg; p<0.001] whereas Ees was higher in DHF vs. SHF [2.8 (2.1–3.1) vs. 0.9 (0.7-1.3) mmHg; p<0.001). VAC was 1.8 (1.3–2.8) in SHF Versus 0.5 (0.4–0.7) in DHF (p<0.001). Compared with SHF, DHF patients had higher SWI [71 (57–83) vs. 48 (39–68) gm×m; p<0.001) and lower PEI [19 (12–26) vs. 44 (36–57) gm×m; p<0.001]. TWI did not differ between SHF and DHF (p=0.14). Work efficiency was higher in DHF than SHF [0.80 (0.74–0.84) vs. 0.53 (0.46–0.64); p<0.001]. DISCUSSION/SIGNIFICANCE OF IMPACT: The results underscore the differences in pathophysiology between SHF and DHF patients with similar symptom burden and exercise capacity. These results highlight the difference in myocardial energy utilization between SHF and DHF.

Age-related left ventricular function in the mouse: analysis based on in vivo pressure-volume relationships

1999 ◽  
Vol 277 (5) ◽  
pp. H1906-H1913 ◽  
Author(s):  
Bo Yang ◽  
Douglas F. Larson ◽  
Ronald Watson
Keyword(s):  
Contractile Function ◽  
Systolic Pressure ◽  
Left Ventricular ◽  
Volume Index ◽  
Lv Function ◽  
Mouse Heart ◽  
Stroke Work ◽  
Arterial Elastance ◽  
Systolic Volume ◽  
End Systolic Volume

Our study compared left ventricular (LV) function between senescent and young adult mice through in situ pressure-volume loop analysis. Two groups of mice ( n = 9 each), 6-mo-old and 16-mo-old (senescent) mice, were anesthetized with urethan and α-chloralose, and their LV were instrumented with a Millar 1.4-Fr conductance micromanometer catheter for the acquisition of the pressure-volume loops. The senescent mice had a significantly decreased contractile function related to load-dependent parameters, including stroke volume index, ejection fraction, cardiac output index, stroke work index, and maximum derivative of change in systolic pressure over time. The load-independent parameters, preload recruitable stroke work and the slope (end-systolic volume elastance) of the end-systolic pressure-volume relationship, were significantly decreased in the senescent mice. Heart rate and arterial elastance were not different between the two groups; however, the ventricular-to-vascular coupling ratio (ratio of elastance of artery to end-systolic volume elastance) was increased by threefold in the senescent mice ( P < 0.001). Thus there were significant decreases in contractile function in the senescent mouse heart that appeared to be related to reduced mechanical efficiency but not related to arterial elastance.

scholarly journals Echocardiography of right ventricular-arterial coupling predicts survival of elderly patients with heart failure and reduced to mid-range ejection fraction

2020 ◽  
Vol 90 (2) ◽  
Author(s):  
Gian Marco Rosa ◽  
Andreina D'Agostino ◽  
Stefano Giovinazzo ◽  
Giovanni La Malfa ◽  
Paolo Fontanive ◽  
...  
Keyword(s):  
Ejection Fraction ◽  
Right Ventricular ◽  
Ace Inhibitor ◽  
Systolic Pressure ◽  
Left Ventricular ◽  
Volume Index ◽  
Systolic Volume ◽  
End Systolic Volume ◽  
And Gender ◽  
The Impact

Echocardiography of right ventricular (RV)-arterial coupling obtained by the estimation of the ratio of the longitudinal annular systolic excursion of the tricuspid annular plane and pulmonary artery systolic pressure (TAPSE/PASP) has been found to be a remarkable prognostic indicator in patients with HF. Our aim was to evaluate the impact of TAPSE, PASP and their ratio in the prognostic stratification of outpatients with HF aged ≥70 years and reduced to mid-range ejection fraction (EF). A complete echocardiographic examination was performed in 400 outpatients with chronic HF and left ventricular (LV) EF ≤50% who averaged 77 years in age. During a median follow-up period of 25 months (interquartile range: 8-46), there were 135 cardiovascular deaths. Two different Cox regression models were evaluated, one including TAPSE and PASP, separately, and the other with TAPSE/PASP. In the first model, LV end-systolic volume index, age, no angiotensin converting enzyme (ACE) inhibitor use, TAPSE, PASP and gender were found to be independently associated with the outcome after adjustment for demographics, clinical, biochemical, echocardiographic data. In the second model, TAPSE/PASP resulted the most important independent predictor of outcome (hazard ratio [HR]:0.07, p<0.0001) followed by LV end-systolic volume index, no ACE inhibitor use, age and gender. The use of the variable TASPE/PASP improved the predictive value of the new multivariable model (area under the curve [AUC] of 0.74 vs AUC of 0.71; p<0.05). TASPE/PASP improved the net reclassification (NRI = 14.7%; p<0.01) and the integrated discrimination (IDI = 0.04; p<0.01). In conclusion, the study findings showed that assessment of RV-arterial coupling by TAPSE/PASP was of major importance to assess the prognosis of patients with chronic HF and LV EF ≤50% aged ≥70 years.

scholarly journals Left Ventricular End-Systolic Volume Is a Reliable Predictor of New-Onset Heart Failure with Preserved Left Ventricular Ejection Fraction

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Marina Kato ◽  
Shuichi Kitada ◽  
Yu Kawada ◽  
Kosuke Nakasuka ◽  
Shohei Kikuchi ◽  
...  
Keyword(s):  
Heart Failure ◽  
Coronary Artery ◽  
Adverse Events ◽  
Ejection Fraction ◽  
Prognostic Indicator ◽  
Left Ventricular ◽  
Volume Index ◽  
Univariable Analysis ◽  
Systolic Volume ◽  
End Systolic Volume

Background. Left ventricular (LV) ejection fraction (EF) and LV volumes were reported to have prognostic efficacy in cardiac diseases. In particular, the end-systolic volume index (LVESVI) has been featured as the most reliable prognostic indicator. However, such efficacy in patients with LVEF ≥ 50% has not been elucidated. Methods. We screened the patients who received cardiac catheterization to evaluate coronary artery disease concomitantly with both left ventriculography and LV pressure recording using a catheter-tipped micromanometer and finally enrolled 355 patients with LVEF ≥ 50% and no history of heart failure (HF) after exclusion of the patients with severe coronary artery stenosis requiring early revascularization. Cardiovascular death or hospitalization for HF was defined as adverse events. The prognostic value of LVESVI was investigated using a Cox proportional hazards model. Results. A univariable analysis demonstrated that age, log BNP level, tau, peak − dP/dt, LVEF, LV end-diastolic volume index (LVEDVI), and LVESVI were associated with adverse events. A correlation analysis revealed that LVESVI was significantly associated with log BNP level (r = 0.356, p<0.001), +dP/dt (r = −0.324, p<0.001), −dP/dt (r = 0.391, p<0.001), and tau (r = 0.337, p<0.001). Multivariable analysis with a stepwise procedure using the variables with statistical significance in the univariable analysis revealed that aging, an increase in BNP level, and enlargement of LVESVI were significant prognostic indicators (age: HR: 1.071, 95% CI: 1.009–1.137, p=0.024; log BNP : HR : 1.533, 95% CI: 1.090–2.156, p=0.014; LVESVI : HR : 1.051, 95% CI: 1.011–1.093, p=0.013, respectively). According to the receiver-operating characteristic curve analysis for adverse events, log BNP level of 3.23 pg/ml (BNP level: 25.3 pg/ml) and an LVESVI of 24.1 ml/m2 were optimal cutoff values (BNP : AUC : 0.753, p<0.001, LVESVI : AUC : 0.729, p<0.001, respectively). Conclusion. In patients with LVEF ≥ 50%, an increased LVESVI is related to the adverse events. LV contractile performance even in the range of preserved LVEF should be considered as a role of a prognostic indicator.

scholarly journals A Comparative Study of Bisoprolol with Carvedilol on LV Systolic Function in Patients with Chronic Heart Failure

2018 ◽  
Vol 14 (1) ◽  
pp. 3-8
Author(s):  
Mohammad Ashraf Hossain ◽  
Khurshed Ahmed ◽  
Md Faisal Ibn Kabir ◽  
Md Fakhrul Islam Khaled ◽  
Rakibul H Rashed ◽  
...  
Keyword(s):  
Heart Failure ◽  
Blood Pressure ◽  
Heart Rate ◽  
Ejection Fraction ◽  
Left Ventricular ◽  
Systolic Volume ◽  
End Diastolic Volume ◽  
Group I ◽  
End Systolic Volume ◽  
Group Ii

Background: Chronic heart failure (CHF) is the most common and prognostically unfavorable outcome of many diseases of the cardiovascular system. Recent data suggest that beta-blockers are beneficial in patients with CHF. Among β-blocker class of drugs, bisoprolol is a highly selective β1-adrenergic receptor blocker whereas Carvedilol is non-selective. Many large-scale trials have confirmed that both these β-blockers are superior to placebo and other β-blockers. This study was designed to compare the effects of carvedilol and bisoprolol in patients with chronic HF in a single center.Methods: It was a quasi experimental study. A total of 288 cases of heart failure were selected by purposive sampling, from January 2017 to June 2017. Each patient was allocated into either of the two groups, and was continued receiving treatment with either bisoprolol (Group-I) or carvedilol (Group-II). Each patient was evaluated clinically and echocardiographically at the beginning of treatment (baseline) and at the end of 3rd month. Echocardiography was performed to find out change in left ventricular systolic function.Result: After 3 months of treatment, ejection fraction was found higher in the bisoprolol group (42.6 ± 6.5 versus 38.3 ± 4.6%; P < 0.05). Ejection fraction (EF) changes were 8.4% in bisoprolol group and 4.1% in carvedilol group. A significant reduction in left ventricular end-systolic volume (21.9±2.5 in group I versus 14.9±5.7 in group II; P < 0.05) and left ventricular systolic diameter (3.2±0.1 in group I versus 2.3±0.5 in group II; P<0.05) occurred after 3 months of treatment. But no significant differences were observed in left ventricular end-diastolic volume (10.1±3.2 versus 6.1±6.4; P=0.101) and left ventricular diastolic diameter (1.7±0.8 versus 1.3±0.8; P=0.081) between groups. Three months after treatment, heart rate was reduced in the bisoprolol group from 87.7±9 to 74.5±8.1 and carvedilol group from 88.8±9.1 to 80.1±8.7. Differences in heart rate responses between 2 groups were not statistically significant (P=0.113). Assessment of blood pressure three months later of treatment shows, systolic blood pressure (SBP) and diastolic blood pressure (DBP) were improved in both group but difference between two groups were statistically non significant (p>0.05).Conclusion: In this study, bisoprolol was superior to carvedilol in increasing left-ventricular ejection fraction, improving left ventricular end systolic volume and left ventricular end systolic diameter but no significant difference was observed in LV end diastolic volume, LV end diastolic diameter, heart rate and blood pressure.University Heart Journal Vol. 14, No. 1, Jan 2018; 3-8

Effect of vasopressin on left ventricular performance

1993 ◽  
Vol 264 (1) ◽  
pp. H53-H60
Author(s):  
C. P. Cheng ◽  
Y. Igarashi ◽  
H. S. Klopfenstein ◽  
R. J. Applegate ◽  
Z. Shihabi ◽  
...  
Keyword(s):  
Systolic Pressure ◽  
Left Ventricular ◽  
Systemic Resistance ◽  
Stroke Work ◽  
Arterial Elastance ◽  
Ventricular Performance ◽  
Systolic Volume ◽  
End Diastolic Volume ◽  
End Systolic Volume ◽  
The Right

We assessed the effect of arginine vasopressin (AVP) on left ventricular (LV) performance in eight conscious dogs. Five minutes after AVP infusion (6 microns.kg-1 x min-1 for 2 min) the plasma AVP was elevated from 3.9 +/- 0.9 to 14.7 +/- 4.6 pg/ml (P < 0.05). With all reflexes intact, AVP caused significant increases in LV end-systolic pressure (P) (112 +/- 8 vs. 122 +/- 7 mmHg, P < 0.05) end-systolic volume (V) (30 +/- 5.8 vs. 38 +/- 7.7 ml, P < 0.05), total systemic resistance (6.2 +/- 1.8 vs. 10.6 +/- 4.0 mmHg.dl-1 x min, P < 0.01) and arterial elastance (Ea) (6.8 +/- 3.0 vs. 8.6 +/- 3.9 mmHg/ml, P < 0.05), while the heart rate (110 +/- 6 vs. 82 +/- 10 beats/min, P < 0.05) and stroke volume (16.5 +/- 4.3 vs. 14.2 +/- 3.9 ml, P < 0.05) were decreased. There was no significant change in the coronary sinus blood flow (82 +/- 19 vs. 78 +/- 22 ml/min, P = not significant). AVP decreased the slopes of LV end-systolic P-V relation (10.7 +/- 1.1 vs. 8.1 +/- 1.9 mmHg/ml, P < 0.05), the maximal first derivative of LV pressure (dP/dtmax)-end-diastolic volume (VED) relation (135.2 +/- 18.7 vs. 63.1 +/- 7.7 mmHg.s-1 x ml-1, P < 0.05), and the stroke work-VED relation (81.1 +/- 4.1 vs. 66.7 +/- 2.8 mmHg, P < 0.05) and shifted the relations to the right, indicating a depression of LV performance. A similar increase in Ea produced by methoxamine did not depress LV performance.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Right ventricular insertion site fibrosis in a dilated cardiomyopathy referral population: phenotypic associations and value for the prediction of heart failure admission or death

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Yoko Mikami ◽  
Aidan Cornhill ◽  
Steven Dykstra ◽  
Alessandro Satriano ◽  
Reis Hansen ◽  
...  
Keyword(s):  
Heart Failure ◽  
Ejection Fraction ◽  
Right Ventricular ◽  
Dilated Cardiomyopathy ◽  
Primary Outcome ◽  
Left Ventricular ◽  
Volume Index ◽  
Systolic Volume ◽  
End Systolic Volume ◽  
Heart Failure Admission

Abstract Background Dilated cardiomyopathy (DCM) is increasingly recognized as a heterogenous disease with distinct phenotypes on late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) imaging. While mid-wall striae (MWS) fibrosis is a widely recognized phenotypic risk marker, other fibrosis patterns are prevalent but poorly defined. Right ventricular (RV) insertion (RVI) site fibrosis is commonly seen, but without objective criteria has been considered a non-specific finding. In this study we developed objective criteria for RVI fibrosis and studied its clinical relevance in a large cohort of patients with DCM. Methods We prospectively enrolled 645 DCM patients referred for LGE-CMR. All underwent standardized imaging protocols and baseline health evaluations. LGE images were blindly scored using objective criteria, inclusive of RVI site and MWS fibrosis. Associations between LGE patterns and CMR-based markers of adverse chamber remodeling were evaluated. Independent associations of LGE fibrosis patterns with the primary composite clinical outcome of heart failure admission or death were determined by multivariable analysis. Results The mean age was 56 ± 14 (28% female) with a mean left ventricular (LV) ejection fraction (LVEF) of 37%. At a median of 1061 days, 129 patients (20%) experienced the primary outcome. Any abnormal LGE was present in 306 patients (47%), inclusive of 274 (42%) meeting criteria for RVI site fibrosis and 167 (26%) for MWS fibrosis. All with MWS fibrosis showed RVI site fibrosis. Solitary RVI site fibrosis was associated with higher bi-ventricular volumes [LV end-systolic volume index (78 ± 39 vs. 66 ± 33 ml/m2, p = 0.01), RV end-diastolic volume index (94 ± 28 vs. 84 ± 22 ml/m2 (p < 0.01), RV end-systolic volume index (56 ± 26 vs. 45 ± 17 ml/m2, p < 0.01)], lower bi-ventricular function [LVEF 35 ± 12 vs. 39 ± 10% (p < 0.01), RV ejection fraction (RVEF) 43 ± 12 vs. 48 ± 10% (p < 0.01)], and higher extracellular volume (ECV). Patient with solitary RVI site fibrosis experienced a non-significant 1.4-fold risk of the primary outcome, increasing to a significant 2.6-fold risk when accompanied by MWS fibrosis. Conclusions RVI site fibrosis in the absence of MWS fibrosis is associated with bi-ventricular remodelling and intermediate risk of heart failure admission or death. Our study findings suggest RVI site fibrosis to be pre-requisite for the incremental development of MWS fibrosis, a more advanced phenotype associated with greater LV remodeling and risk of clinical events.

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