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Simeoli PS, Moscardelli S, Urbani A, Santangelo G, Battaglia V, Guarino M, Bursi F, Guazzi M. Use and Implications of Echocardiography in the Hemodynamic Assessment of Cardiogenic Shock. Curr Probl Cardiol 2023; 48:101928. [PMID: 37422046 DOI: 10.1016/j.cpcardiol.2023.101928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/10/2023]
Abstract
Cardiogenic shock (CS) is a complex multisystem syndrome due to pump failure, associated with high mortality and morbidity. Its hemodynamic characterization is key to the diagnostic algorithm and management. Pulmonary artery catheterization is the gold standard for the left and right hemodynamic evaluation, but some concerns exist for invasivity and untoward mechanical and infective complications. Transthoracic echocardiography is a robust noninvasive diagnostic tool for hemodynamic multiparametric assessment that well applies to the management of CS. Its applications expand from etiology definition to the choice of therapeutic intervention and their monitoring. The present review aims at detailing the role of ultrasounds in CS emphasizing the clinical implications of combining cardiac and non-cardiac ultrasounds examinations that may correlate with prognosis.
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Affiliation(s)
- Pasquale S Simeoli
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy.
| | - Silvia Moscardelli
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
| | - Andrea Urbani
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
| | - Gloria Santangelo
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
| | - Valeria Battaglia
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
| | - Mariachiara Guarino
- Division of Anesthesiology, Cardiothoracic and Vascular department, University of Milan-Bicocca, Milan, Italy
| | - Francesca Bursi
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
| | - Marco Guazzi
- Division of Cardiology, Department of Health Sciences, San Paolo Hospital, University of Milan, Milan, Italy
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Piura E, Engel O, Doctory N, Arbib N, Biron-Shental T, Kovo M, Arnon S, Markovitch O. Velocity Time Integral: A Novel Method for Assessing Fetal Anemia. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1090. [PMID: 37508587 PMCID: PMC10377850 DOI: 10.3390/children10071090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/04/2023] [Accepted: 06/19/2023] [Indexed: 07/30/2023]
Abstract
The velocity time integral (VTI) is a clinical Doppler ultrasound measurement of blood flow, measured by the area under the wave curve and equivalent to the distance traveled by the blood. This retrospective study assessed the middle cerebral artery (MCA) VTI of fetuses in pregnancies complicated by maternal alloimmunization. Doppler indices of the MCA were retrieved from electronic medical records. Systolic deceleration-diastolic time, systolic acceleration time, VTI, and peak systolic velocity (PSV) were measured at 16-40 weeks gestation. Cases with PSV indicating fetal anemia (cutoff 1.5 MoM) and normal PSV were compared. The study included 255 Doppler ultrasound examinations. Of these, 41 were at 16-24 weeks (group A), 100 were at 25-32 weeks (group B), and 114 were at 33-40 weeks (group C). VTI increased throughout gestation (5.5 cm, 8.6 cm, and 12.1 cm in groups A, B, and C, respectively, p = 0.003). VTI was higher in waveforms calculated to have MCA-PSV ≥ 1.5 MoM compared to those with MCA-PSV < 1.5 MoM (9.1 cm vs. 14.1 cm, respectively, p < 0.001), as was VTI/s (22.04 cm/s vs. 33.75 cm/s, respectively; p < 0.001). The results indicate that the MCA VTI increases significantly among fetuses with suspected anemia, indicating higher perfusion of hemodiluted blood to the brain. This feasible measurement might provide a novel additional marker for the development of fetal anemia.
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Affiliation(s)
- Ettie Piura
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Offra Engel
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Neta Doctory
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Nisim Arbib
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Tal Biron-Shental
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Michal Kovo
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Shmuel Arnon
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Department of Neonatology, Meir Medical Center, Kfar Saba 4428164, Israel
| | - Ofer Markovitch
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428164, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
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Blanco P. Rationale for using the velocity-time integral and the minute distance for assessing the stroke volume and cardiac output in point-of-care settings. Ultrasound J 2020; 12:21. [PMID: 32318842 PMCID: PMC7174466 DOI: 10.1186/s13089-020-00170-x] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 04/15/2020] [Indexed: 12/27/2022] Open
Abstract
Background Stroke volume (SV) and cardiac output (CO) are basic hemodynamic parameters which aid in targeting organ perfusion and oxygen delivery in critically ill patients with hemodynamic instability. While there are several methods for obtaining this data, the use of transthoracic echocardiography (TTE) is gaining acceptance among intensivists and emergency physicians. With TTE, there are several points that practitioners should consider to make estimations of the SV/CO as simplest as possible and avoid confounders. Main body With TTE, the SV is usually obtained as the product of the left ventricular outflow tract (LVOT) cross-sectional area (CSA) by the LVOT velocity–time integral (LVOT VTI); the CO results as the product of the SV and the heart rate (HR). However, there are important drawbacks, especially when obtaining the LVOT CSA and thus the impaction in the calculated SV and CO. Given that the LVOT CSA is constant, any change in the SV and CO is highly dependent on variations in the LVOT VTI; the HR contributes to CO as well. Therefore, the LVOT VTI aids in monitoring the SV without the need to calculate the LVOT CSA; the minute distance (i.e., SV × HR) aids in monitoring the CO. This approach is useful for ongoing assessment of the CO status and the patient’s response to interventions, such as fluid challenges or inotropic stimulation. When the LVOT VTI is not accurate or cannot be obtained, the mitral valve or right ventricular outflow tract VTI can also be used in the same fashion as LVOT VTI. Besides its pivotal role in hemodynamic monitoring, the LVOT VTI has been shown to predict outcomes in selected populations, such as in patients with acute decompensated HF and pulmonary embolism, where a low LVOT VTI is associated with a worse prognosis. Conclusion The VTI and minute distance are simple, feasible and reproducible measurements to serially track the SV and CO and thus their high value in the hemodynamic monitoring of critically ill patients in point-of-care settings. In addition, the LVOT VTI is able to predict outcomes in selected populations.
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Affiliation(s)
- Pablo Blanco
- Intensive Care Physician, Intensive Care Unit, Clínica Cruz Azul, 2651, 60 St., 7630, Necochea, Argentina.
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