scholarly journals Effect of 3D-Printed Hearts Used in Left Ventricular Outflow Tract Obstruction: A Multicenter Study

2022 ◽  
Author(s):  
Xianzhi Wang ◽  
Jixiang Liang ◽  
Cunfu Mu ◽  
Wenlin Zhang ◽  
Chunzhu Xue ◽  
...  
Keyword(s):  
Left Ventricular Outflow Tract ◽  
Operation Time ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Control Group ◽  
Intraoperative Blood Loss ◽  
Left Ventricular Outflow ◽  
3D Printed ◽  
Experimental Group

Abstract Objective:The purpose of this research was to explore the application value of a three-dimensional (3D)-printed heart in the operation for left ventricular outflow tract (LVOT) obstruction. Methods: From August 2019 to October 2021, 46 patients with LVOT obstruction underwent surgical treatment at Peking University International Hospital, Southwest Medical University Affiliated Hospital of Traditional Chinese Medicine and Guangyuan First People's Hospital. According to the treatment method, 22 cases were allocated to the experimental group and 24 cases to the control group . The operation time, cardiopulmonary bypass time, intraoperative blood loss, hospitalization time, postoperative ejection fraction (EF), left ventricular flow velocity (LVFV), LVOT pressure difference (LVP), postoperative interventricular septal thickness (IST), inner diameter of the left ventricular outflow tract (IDLV), systolic anterior motion (SAM), atrioventricular block rate, aortic regurgitation (AR) rate and surgical complication rate of the two groups were compared. Results: The operation time, cardiopulmonary bypass time, intraoperative blood loss, hospitalization time, LVP, postoperative IST, AR, SAM, and postoperative LVFV of the experimental group were significantly lower than those of the control group (P < 0.05). The IDLV was larger than that of the control group (P < 0.05). There was no significant difference in the postoperative EF, atrioventricular block rate or complication rate between the two groups (P > 0.05). Conclusion: A 3D-printed heart model for in vitro simulation surgery is conducive to formulating a more reasonable surgical plan and reducing surgical trauma and operation time, thereby promoting the recovery and maintenance of the heart.

scholarly journals The Clinical Manifestation of Straight Back Syndrome in Echocardiogram Performance

2021 ◽  
Author(s):  
Wanqian Yu ◽  
Hongzhou Zhang ◽  
Pingping Yang ◽  
Lujin Gan ◽  
Chenxi Wang ◽  
...  
Keyword(s):  
Right Ventricular ◽  
Supine Position ◽  
Left Ventricular Outflow Tract ◽  
Right Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Standing Position ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Left Ventricular Outflow ◽  
Experimental Group

Abstract Background: There were no studies on the mechanism of clinical manifestations of straight back syndrome. Our aim was to explore the mechanism of clinical symptoms of straight back syndrome.Methods: From February 2018 to February 2021, we included 4 patients (3 males and 1 female) with straight back syndrome as the experimental group, and 4 normal people matched with sex and BMI as the normal control group. Basic information of patients, laboratory examination, echocardiography in supine and standing position, chest film in positive and lateral position, basic information of control group and echocardiography in supine and standing position were collected. The differences of clinical data between the two groups were compared and analyzed. Results: There were significant differences in left ventricular outflow tract diameter, right ventricular outflow tract diameter and right ventricular outflow tract velocity in the experimental group (their P values were 0.035, 0.011 and 0.015, respectively), but there was no significant difference in left ventricular outflow tract velocity in the standing and supine position (P=0.638). The left ventricular outflow tract diameter, the right ventricular outflow tract diameter and the right ventricular outflow tract velocity in the experimental group were significantly different (P<0.05). The internal diameters of left ventricular outflow tract in upright position, supine position, right ventricular outflow tract, supine position, right ventricular outflow tract were20.50±1.91mm, 18.75±0.96mm;10.00±6.68mm, 15.45±6.06mm;124.25±40.29cm/s and 91.00±28.93cm/s, respectively, in standing position, recumbent position, right ventricular outflow tract, right ventricular outflow tract, supine position, right ventricular outflow tract, supine position, supine position. The velocity of left ventricular outflow tract in upright position was 82.50±2.01 cm/s, and that in supine position was 83.25±2.06 cm/s. There was no significant difference in left ventricular outflow tract velocity in standing and supine position, which may be related to the compression of right ventricular outflow tract.Conclusions: In this study, we got the clinical manifestations of direct-back syndrome patients through comparison of straight back syndrome.

Pulmonary Autograft Coronary-Cameral Fistula Leading to LVOT Pseudoaneurysm Post Ross Procedure

2020 ◽  
pp. 215013512093899
Author(s):  
Habib Jabagi ◽  
Letizia Gardin ◽  
Gyaandeo Maharajh
Keyword(s):  
Left Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Ross Procedure ◽  
Pulmonary Autograft ◽  
Left Ventricular Outflow ◽  
Coronary Cameral Fistula ◽  
Coronary Cusp

We report the case of a presumed coronary-cameral fistula arising directly below the commissures of the noncoronary cusp (NCC) and left coronary cusp (LCC) of the pulmonary autograft, leading to left ventricular outflow tract pseudoaneurysm and late tamponade post Ross procedure.

scholarly journals Norepinephrine-associated left ventricular outflow tract obstruction and systolic anterior movement

2019 ◽  
Vol 12 (12) ◽  
pp. e225879 ◽  
Author(s):  
Warner Mbuila Mampuya ◽  
Jonathan Dumont ◽  
Francois Lamontagne
Keyword(s):  
Blood Pressure ◽  
Left Ventricular Outflow Tract ◽  
Myocardial Hypertrophy ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Increase Blood Pressure ◽  
Ventricular Outflow Tract Obstruction ◽  
Left Ventricular Outflow ◽  
Systolic Anterior Movement

In the perioperative setting, norepinephrine is used to increase blood pressure, an effect mediated mostly via arterial and venous vasoconstriction. Thus, norepinephrine is, allegedly, less likely to cause or worsen left ventricular outflow tract obstruction (LVOTO) than other inotropes. We report a case of norepinephrine-associated dynamic LVOTO and systolic anterior movement in a predisposed patient. This report highlights that unrecognised dynamic LVOTO may worsen shock parameters in patients treated with norepinephrine who have underlying myocardial hypertrophy.

scholarly journals Unstable angina complicated with dynamic left ventricular outflow tract obstruction

2021 ◽  
Vol 23 (4) ◽  
pp. 181-188
Author(s):  
Kazuyuki Ozaki ◽  
Takeshi Okubo ◽  
Kenichi Hagiya ◽  
Naoki Kubota ◽  
Keiichi Tsuchida ◽  
...  
Keyword(s):  
Unstable Angina ◽  
Left Ventricular Outflow Tract ◽  
Ventricular Outflow Tract ◽  
Left Ventricular ◽  
Outflow Tract ◽  
Ventricular Outflow Tract Obstruction ◽  
Left Ventricular Outflow
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