Abstract 19826: Utility of Stroke Volume Index for Stratification of Patients With Low Gradient Severe Aortic Stenosis and Normal Left Ventricular Ejection Fraction

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Hong Shen ◽  
Brandon Stacey ◽  
Bob Applegate ◽  
David Zhao ◽  
Sujethra Vasu ◽  
...  

Background: Decision of intervention for low gradient severe aortic stenosis (AS) with normal left ventricular ejection fraction (LVEF) is clinically challenging. The study was to determine the impact of stroke volume index (SVi) on prognosis in patients (pts) with AS. Methods: We examined 410 pts with moderate or severe AS and normal EF (≥50%). Pts were divided into four groups based on aortic valve area (AVA), mean pressure gradient (MPG) and SVi: Group I: low flow low gradient severe AS (AVA≤1.0cm 2 , MPG<40mmHg and SVi<35mL/m 2 , n=75); Group II: normal flow low gradient severe AS (AVA≤1.0cm 2 , MPG<40mmHg and SVi≥35mL/m 2 , n=97); Group III: severe AS with matched gradient-AVA (AVA≤1.0cm 2 and MPG≥40mmHg, n=88); Group IV: moderate AS (AVA>1.0cm 2 and MPG>20mmHg, <40 mmHg, n=150). Aortic valve gradients, AVA and SVi were assessed by echocardiography. Clinical charts were reviewed. Mean follow-up duration was 3.2±1.6 years. Results: Group I had higher prevalence of atrial fibrillation, more pronounced LV hypertrophy, lower SVi, smaller AVA, higher valvuloarterial impedance (Zva) (Table) and lower 3-year cumulative survival compared to Group II and Group IV (61% vs. 75% and 80%, p=0.004). Group II had a 3-year cumulative survival similar to moderate AS (75% vs. 80%, p>0.05). In pts with medical management, Group I and Group III had lower 3-year cumulative survival in comparison with Group II and Group IV (48% and 56% vs. 73% and 76%, p=0.001). Multivariate analysis showed SVi was a strong predictor of mortality in low gradient severe AS (HR 0.95, CI: 0.91-0.99, P=0.02). However, in gradient-AVA matched severe AS and moderate AS, SVi was not associated with mortality (p>0.05). Conclusions: Without AS intervention, low flow low gradient severe AS with normal EF carries poor prognosis similar to high gradient AS, but normal flow low gradient AS does not, suggesting that SVi may be used to identify the pts benefiting most from AS intervention in pts with low gradient AS.

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
S Schwartzenberg ◽  
Y Shapira ◽  
M Vaturi ◽  
M Nassar ◽  
A Hamdan ◽  
...  

Abstract Funding Acknowledgements None BACKGROUND Aortic stenosis (AS) classification depends on left-ventricular ejection-fraction (LVEF &lt;≥50%), aortic valve area (AVA&lt;≥1cm2), mean pressure gradient (MG&lt;≥40mmHg), peak velocity&lt;≥400 cm/sec, and stroke-volume index (SVI&lt;≥35ml/m2). Aortic Valve Agatston CT score (AVC) correlates with AS severity by trans-thoracic echo (TTE), but its association with AS severity determined by integrated TTE and TEE is unknown. PURPOSE We investigated correlation of AVC with dichotomous AS grouping by Integrated TTE + TEE vs TTE only. METHODS 64 TAVI candidates underwent sequential TTE and TEE, of which 24 underwent coronary CT within 4 months. Based on recommended conservative vs invasive treatment implication (A/B respectively), AS types were aggregated separately by TTE or Integrated TTE-TEE into two groups: Group-A (Moderate AS and Normal-Flow Low-Gradient), and Group-B (High-Gradient, Low-EF Low-Flow Low-Gradient, and Paradoxical Low-Flow Low-Gradient). Continuous and dichotomous AVC correlation (cutoffs based on guidelines) with echo binary classification was then determined. RESULTS Patients were 81.1(77.3-84.6) years old, 18(48.6%) were women, and had LVEF of 60% (49-65). AVC-score distribution in the two AS A/B Groups by two echo modalities is presented in the boxplot Figure. Only classification by TTE held discriminative accuracy in A/B grouping, with Area-Under-Curve of 0.736 (CI 0.57-0.9), and optimal threshold value of 1946 AU having 77% sensitivity and 74% specificity. Compared with AVC dichotomous classification, integrated TTE + TEE upgraded AS class (from A to B) in 5/6 (83.3%) patients vs 12/18 (66.7%) in which it downgraded AS class from B to A. CONCLUSIONS Aortic valve calcification correlates well with AS class dichotomized by operative implication through conventional TTE but not through integrated TTE + TEE. Our preliminary results appear to be caused by initial selection bias of patients in whom coronary CT performance was deemed to be justified by the treating physician rather than reflect a true better correlation between CT score and AS assessment by TTE vs by integrated TTE + TEE. Abstract P1370 Figure.


2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Ryan Gassner ◽  
David Schreier ◽  
Timothy Hacker ◽  
Diana M. Tabima ◽  
Naomi Chesler

Abstract Sickle cell disease (SCD) is a hereditary blood disorder affecting millions of people in which red blood cells (RBCs) become sickled and lyse easily driven by polymerization of hemoglobin. Chronically, SCD causes anemia and biventricular dysfunction. GBT440 is an experimental treatment for SCD that prevents hemoglobin polymerization. We hypothesized that 17-month-old Berkeley SCD mice treated with GBT440 would have increased hematocrit (Hct) and better biventricular function compared to vehicle treated SCD mice. Our results demonstrate that 3 weeks of GBT440 treatment eliminated chronic anemia, increased left ventricular ejection fraction (LVEF) and stroke volume index, and improved right ventricular function. Overall, our findings support a therapeutic effect of GBT440 in vivo in a small animal model of SCD. Next steps in investigating mechanisms of improved cardiac function are warranted.


2021 ◽  
Vol 11 (4) ◽  
pp. 264-270
Author(s):  
O. V. Arsenicheva

The aim. To study the risk factors for hospital mortality in patients with acute coronary syndrome with ST-segment elevation (STEACS) complicated by cardiogenic shock (CS).Materials and methods. A total of 104 patients with STEACS complicated by CS were studied. The follow-up group (group I) included 58 (55,8%) patients who died in hospital (mean age 71,8±7,31 years), the comparison group (group II) – 46 patients, who have been treated and discharged (mean age 59,5±6,18 years). All patients underwent general clinical studies, the level of troponins, lipids, glucose, creatinine in plasma was determined, electrocardiography and echocardiography were performed. Coronary angiography and percutaneous coronary intervention (PCI) were urgently performed. The method of binary logistic regression with the determination of the odds ratio and its 95% confidence interval for each reliable variable was used to identify risk factors for hospital mortality.Results. In group I patients with CS, compared with group II, patients over the age of 70 (32 (55,2%) vs 10 (22,7%), р=0,0004), with concomitant chronic kidney disease (32 (55,2%) vs 9 (19,6%), p=0,0002), postinfarction cardiosclerosis (30 (51,7%) vs 9 (19,6%), р=0,001) and chronic heart failure of III-IV functional class (32 (55,1%) vs 11 (23,9%), p=0,001) were significantly more often observed. Baseline levels of plasma leukocytes, troponin and creatinine were significantly higher in deceased patients with CS. Left ventricular ejection fraction below 40% was observed more often in the follow-up group than in the comparison group (46 (79,3%) vs 27 (58,7%), p=0,022). In group I, compared with group II, there was a higher incidence of three-vessel coronary lesions (36 (75%) vs 12 (26,1%), p=0,0001) and chronic coronary artery occlusion unrelated to STEACS (25 (52,1%) vs 12 (26,1%), р=0,009). The same trend was observed when assessing the average number of stenoses and occlusions of the coronary arteries. PCI was performed in 43 (74,1%) of the deceased and 43 (93,5%) of the surviving STEACS patients with CS (p=0,009). The follow-up group had a higher rate of unsuccessful PCI (30,2%) vs 3 (7%), р=0,001) and performed later than 6 hours after the onset of an angina attack (28 (65,1%) vs 6 (14%), р=0,0001).Summary. Hospital mortality in patients with STEMI complicated by CS was associated with the presence left ventricular ejection fraction less than 40%, three-vessel coronary lesion and performing PCI later than 6 hours from the beginning of the pain attack.


2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
T Sugimoto ◽  
F Bandera ◽  
G Generati ◽  
E Alfonzetti ◽  
M Guazzi

Abstract Background The hemodynamic impact of left atrial (LA) dynamics in aortic stenosis (AS) in relation to cardiopulmonary response to exercise has never been studied. We aimed at investigating the link between LA function vs hemodynamics and prognosis in asymptomatic severe AS patients. Methods A total of 106 patients: 76 asymptomatic severe AS patients (aortic valve area (AVA) &lt;1.0 cm2 or AVA index &lt;0.6 cm2/m2) and 30 gender-matched control subjects underwent cardiopulmonary exercise testing combined with Echo-Doppler with assessment of LA strain. AS patients were divided into 4 groups according to peak aortic jet velocity (PV), mean pressure gradient (MPG), stroke volume index (SVI), and left ventricular ejection fraction (LVEF). Results Normal-flow low-gradient AS (NFLG: PV &lt;4 m/s and MPG &lt;40 mmHg, SVI &gt;35ml/m2, LVEF ≥50%, N=23), High-gradient AS (HG: PV ≥4 m/s or MPG ≥40 mmHg, LVEF ≥50%, N=23), Paradoxical low-flow low-gradient AS (PLFLG: PV &lt;4 m/s and MPG &lt;40 mmHg, SVI ≤35ml/m2, LVEF ≥50%, N=18), and Classical low-flow AS (CLF: LVEF &lt;50%, N=12) had a higher LA volume index than Control (Control 22±6, NFLG 38±12*, HG 33±9*, PLFLG 33±11*, and CLF 49±15* ml/m2, *P&lt;0.05 vs Control). In PLFLG and NFLG AS, LA strain at rest (21±9 and 26±13%) and during exercise (26±12 and 31±14%) were decreased compared to Control (37±8% at rest, 43±11% during exercise) but LA strain was increased from rest to exercise (P&lt;0.001). HG and CLF AS had no increase in LA strain (31±15 and 19±10% at rest, 28±15 and 18±9% during exercise) (figure). In Cox proportional hazards analysis, age and gender adjusted hazard ratio for the composite end point (aortic valve replacement, hospitalization for heart failure, and all-cause mortality) of changes in LA-strain from rest to exercise (1% increase) was 1.05 (95% CI 1.00 to 1.09, P=0.044) among AS patients. Conclusions In asymptomatic severe AS, the study of LA functional adaptation to exercise plays a key role in the hemodynamic unfavorable cascade signaling major adaptive differences in dynamics during physical challenge. Overall, LA dynamics provides prognostic information also in AS patients. FUNDunding Acknowledgement Type of funding sources: None.


2021 ◽  
Vol 42 (Supplement_1) ◽  
Author(s):  
M Saito ◽  
M Kinoshita ◽  
H Nakagawa ◽  
T Sumimoto

Abstract Background In Japan, ivabradine is indicated in patients with heart failure (HF) with sinus rhythm and a resting heart rate (HR) ≥75/min under standard treatment. Particularly, it is effective for HF with reduced left ventricular ejection fraction (LVEF). However, elderly people have a higher incidence of atrial fibrillation than young people, and their sinus node function is further deteriorated, resulting in a lower intrinsic HR. In addition, Japan is an ultra-aging society, especially in the countryside; therefore, the target patients for ivabradine may be limited in these regions. Purpose We sought to estimate the possible candidates for ivabradine and investigate their clinical characteristics in our hospital located in rural Japan. Method and results We retrospectively studied 14733 consecutive patients who were suspected heart disease who underwent echocardiography between January 2006 and October 2018 in Kitaishikai Hospital located in Ozu city (Proportion of the population aged ≥65 years: 34%, in 2015) and did not take ivabradine treatment. Of these, 187 patients with hemodynamically stable condition whose E/A ratio was measured and met the criteria of LVEF &lt;40% and HR ≥75 /min were confirmed. Of these, 153 patients reached HR &lt;75 /min with additional intensive medication within one year after the index echocardiography (Controlled group; mean HR: 82 to 62/min). The remaining 34 patients with uncontrolled HR (Uncontrolled group; mean HR: 84 to 82/min) were considered possible candidates for ivabradine (34/14733: 0.23%, 2.6 patients per year; median age, 74 years; male, 56%; median LVEF, 32%; ischemic cardiomyopathy, 53%). In the comparison of clinical and echocardiographic parameters in these two groups, Uncontrolled group had a significantly smaller left ventricular diastolic volume index (71 [59–85] vs 82 [66–109] /ml/m2, p=0.02), left ventricular systolic volume index (50 [39–59] vs 59 [42–80] / ml/m2, p=0.04), stroke volume index (22 [18–26] vs 26 [20–32] /ml/m2, p=0.02), left atrial volume index (47 [40–64] vs 59 [45–71] /ml/m2, p=0.02), and more hemodialysis (12 vs 3%, p=0.04) than Controlled group. However, the discrimination ability of these parameters for identifying Uncontrolled group was modest (Figure). Conclusion In rural Japan, possible candidates for ivabradine may be rare, so daily attention should be paid. Patients with reduced ejection fraction, small left ventricle, and hemodialysis may be the possible targets for this therapy. FUNDunding Acknowledgement Type of funding sources: None.


2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
M Fredholm ◽  
S E Ricksten ◽  
K Karason ◽  
S E Bartfay ◽  
G Dellgren ◽  
...  

Abstract Background and aim The occurrence of right ventricular failure (RVF) in patients with chronic left heart disease (LHD) has important therapeutic and prognostic consequences. Echocardiography (Echo) parameters describing the RV longitudinal function (tricuspid annular plane systolic excursion, TAPSE; peak systolic free wall longitudinal strain, RV-Str; tricuspid annulus peak systolic velocity, TAPSm) are today commonly used to define RV dysfunction. In the present study we hypothesised that these parameters are load dependent. Methods We retrospectively included 66 patients with LHD (age 52 ± 13 years, males 79%) that underwent right heart catheterization (RHC) and Echo within 48 hours. RHC was performed as part of diagnostic- or pre-transplant work-up. Fifty-six patients (85%) had left ventricular ejection fraction &lt; 40%. From RHC data the patients were divided into three groups: Patients with RV decompensation and increased right atrial pressure (RAP) ≥10 mmHg (iRAP, n = 21), with normal RAP but reduced stroke volume index (SVI &lt; 35 mL/m2) (rSVI, n = 21) and with normal RAP and normal SVI (nSVI, n = 24). Results Patients with iRAP had compared with rSVI/nSVI more advanced LHD with higher PAMP, PCWP and larger RV diastolic area (RVdA). TAPSE, RV-Str and FAC did not differ between iRAP and rSVI patients. The ratio RVdA/RV-Str was significantly higher in iRAP patients compared with rSVI and nSVI. The rSVI and nSVI patients did not differ regarding RAP response during supine exercise (P = 0.84). Conclusions Reduced RV longitudinal function in patients with chronic LHD and normal RAP can be due to left ventricular forward failure and not RV systolic dysfunction. iRAP (n = 21) rSVI (n = 21) nSVI (n = 24) Overall P-value iRAP vs rSVI iRAP vs nSVI rSVI vs nSVI RAP (mmHg) 13 ± 2 5 ± 3 4 ± 2 &lt;0.001 &lt;0.001 &lt;0.001 0.34 PAMP (mmHg) 33 ± 8 24 ± 8 22±] &lt;0.001 0.001 &lt;0.001 0.34 PCWP (mmHg) 22 ± 5 16 ± 8 11 ± 6 &lt;0.001 0.003 &lt;0.001 0.025 CI (l/min/m2) 2.2 ± 0.4 2.2 ± 0.4 2.8 ± 0.5 &lt;0.001 0.75 &lt;0.001 &lt;0.001 PVR (Wood unit) 2.6 ± 1.2 1.5 ± 1.6 1.9 ± 1.0 0.032 0.022 0.035 0.60 RVdA (cm2) 26 ± 7 21 ± 7 21 ± 5 0.012 0.007 0.017 0.63 TAPSE (mm) 12 ± 3 13 ± 3 18 ± 6 &lt;0.001 0.28 &lt;0.001 0.001 TAPSm (cm/s) 8 ± 2 8 ± 2 10 ± 4 0.06 - - - RV-str (%) -15 ± 5 -17 ± 5 -21 ± 6 0.002 0.11 0.001 0.028 FAC (%) 28 ± 9 29 ± 11 39 ± 11 &lt;0.001 0.72 0.001 0.003 RVdA/RV-str (cm2/%) 2.2 ± 1.3 1.3 ± 0.7 1.1 ± 0.6 &lt;0.001 0.013 0.001 0.27


2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
J Sen ◽  
T Manning ◽  
K Innes-Jones ◽  
C Neil ◽  
T.H Marwick

Abstract Background Aortic stenosis (AS) is a common primary heart valve disease in the elderly. Low-flow, low-gradient (LFLG) AS is an increasingly important phenotype. Purpose To evaluate the temporal changes in incidence of severe AS phenotypes: paradoxical LFLG, classical LFLG and non-LFLG and explore risk factors that contribute to temporal trends. Methods We analyzed 25,507 consecutive transthoracic echocardiograms over 6½ years between 2013 and 2019 divided into deciles. LFLG-AS was defined as mean transvalvular pressure gradient &lt;40 mmHg and stroke volume index (SVi) &lt;35 mL/m2, aortic valve area (AVA) &lt;1 cm2 or indexed AVA &lt;0.6 cm2/m2, with either normal (paradoxical LFLG) or decreased (&lt;40%; classical LFLG) left ventricular ejection fraction. Trends and associations with patients characteristics and comorbidities were assessed over time in deciles. Results Of 891 cases that fulfilled severe AS criteria, there were 536 cases of LFLG-AS (85 classical and 451 paradoxical LFLG-AS). There was a statistically significant increase in incidence of paradoxical LFLG-AS between each time interval (p&lt;0.0001), while significant reduction in incidence of non-LFLG-AS (p=0.009) that was not seen with classical LFLG-AS (p=0.7) (Figure). More comprehensive echocardiographic assessment of relevant parameters over time assisted with identification of LFLG-AS cases. Intrinsic patient factors such as age and E/e' contributed towards the increasing trend of paradoxical LFLG-AS. There was a rising population aged over 70 years (p=0.01). Multivariate logistic regression analysis showed that age, sex, E/e', obesity, atrial fibrillation and heart rate were potential risk factors responsible for temporal trend towards rising paradoxical LFLG-AS incidence. There was also a gradual increase in number of patients with low transvalvular flow rate (&lt;200mL/s) over time (p=0.04). Conclusion The incidence of paradoxical LFLG-AS is rising in a hospital echocardiogram service. The parallel increase in LV filling pressure and age in AS patients suggests the increment in LFLG-AS is related to changes to the LV myocardium. Subtypes of aortic stenosis over time Funding Acknowledgement Type of funding source: None


2012 ◽  
Vol 11 (1) ◽  
pp. 73-78
Author(s):  
N. V. Shashkova ◽  
S. N. Tereshchenko ◽  
L. E. Samoylenko ◽  
D. F. Satlykova ◽  
A. M. Gerasimov

Aim. To study the effects of transluminal balloon angioplasty (TLBAP) and stenting on right and left ventricular (RV, LV) hemodynamics, as well as on long-term clinical prognosis, in patients with ischemic chronic heart failure (CHF). Material and methods. In 20 patients with ischemic CHF, Functional Class (FC) II–III (NYHA), radionuclide 4D tomoventriculography (4D-RTVG) was performed at baseline and 6 and 12 months after TLBAP, in order to assess cardiac hemodynamics. Based on ejection fraction (EF) values, all participants were divided into two groups. Group I (n=10; mean age 57,2 (2,7) years) included men with EF <45%, FC II–III CHF, and mean CHF duration of 3,1 (0,6) years. Group II (n=10; mean age 62,6 (2,7) years) included 5 men and 5 women with EF >45%, FC II CHF, and CHF duration of 2 (0,4) years. Results. Twelve months after TLBAP, Group I demonstrated a significant increase in stroke volume (SV), LV EF, and RV EF, as well as an improvement in LV maximum ejection velocity (MEV), maximum filling velocity (MFV), and maximum filling time (MFT), as well as in LV and RV one-third filling fraction (1/3 FF) (p<0,05). A decrease in LV enddiastolic volume (EDV), LV end-systolic volume (ESV), and RV ESV, some increase in RV EDV, and an improvement in RF MEV, MFV, and MFT were non-significant (p>0,05). In Group II, an increase in LV SV and LV EF, as well as an improvement in RV 1/3FF and MFT, was statistically significant (p<0,05). At the same time, an increase in RF SV, EF, EDV, and ESV, as well as an improvement in LV and RV MEV and MFV, LV 1/3FF and LV MFT, without any substantial changes in LV EDV and ESV, lacked statistical significance (p>0,05). Cardiac hemodynamic changes were associated with improved quality of life (QoL) and reduced CHF FC and angina FC. Conclusion. TLBAP and stenting facilitated an increase in EF and SV, an improvement in LF and RF systolic and diastolic function, an improvement in QoL and exercise capacity, and a reduction in CHF FC and angina FC.


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