ISSN 2305-3127 (Print)   
ISSN 2664-3790 (Online)

 

Original research

DOI: http://doi.org/10.31928/2305-3127-2022.1-2.3846

Performance index – a new approach to the assessment of left ventricular systolic function

 V.I. Pavliuk 1, О.A. Myshakivsky 1, M.V. Voytsekhivska 1, O.J. Zharinov 2

1 Lviv Regional Clinical Hospital, Lviv, Ukraine
2 Shupyk National Healthcare University of Ukraine, Kyiv, Ukraine

The aim – to develop a new approach to the assessment of LV systolic function – LV systolic performance index. To check correlation of this index with left ventricular ejection fraction determined by standard Simpson planimetric method.
Materials and methods. A total of 121 patients were included into the study. We first determined left ventricular ejection fraction by Simpson method for each patient included in the study, and then determined VTI in the LVOT and myocardial motion velocity in four LV parts. We evaluated the correlation of these indices with left ventricular ejection fraction and derived a hybrid index of LV systolic function performance based on stepwise multiple regression.
Results and discussion. The myocardial velocity in four LV parts, its averaged value and velocity time integral in LVOT not only showed a high level of correlation with left ventricular ejection fraction, but appeared also its independent predictors in multivariate analysis. The hybrid formula «0.7 × Sum of MV + VTI» derived in our study provides an index of LV systolic function performance. A good correlation of the new index with left ventricular ejection fraction determined by Simpson (Kendall’s tau 0.818; p < 0.00001) was revealed.
Conclusions. We proposed a new index of LV systolic function estimation and showed that it allows reliable estimation of LV systolic function in various myocardial pathologies with less time.

Key words: LV systolic function, ejection fraction, performance index.

 

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© "Cardiac Surgery and Interventional Cardiology" Ukrainian scientific and practical peer-reviewed journal, 2023

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  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `l8uf4_categories` AS `s` INNER JOIN `l8uf4_categories` AS `c` ON (`s`.`lft` < `c`.`lft` AND `c`.`lft` < `s`.`rgt` AND `c`.`language` IN (:preparedArray2,:preparedArray3)) OR (`c`.`lft` <= `s`.`lft` AND `s`.`rgt` <= `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`852μs3.94KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `l8uf4_modules` AS `m` LEFT JOIN `l8uf4_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `l8uf4_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) AND `m`.`language` IN (:preparedArray2,:preparedArray3) ORDER BY `m`.`position`,`m`.`ordering`836μs2.22KBParams/libraries/src/Cache/Controller/CallbackController.php:51Copy
  • SELECT `c2`.`language`,`c2`.`id` FROM `l8uf4_menu` AS `c` INNER JOIN `l8uf4_associations` AS `a` ON `a`.`id` = `c`.`id` AND `a`.`context` = :context INNER JOIN `l8uf4_associations` AS `a2` ON `a`.`key` = `a2`.`key` INNER JOIN `l8uf4_menu` AS `c2` ON `a2`.`id` = `c2`.`id` WHERE `c`.`id` = :id324μs1.41KBParams/libraries/src/Language/Associations.php:145Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `l8uf4_scheduler_tasks` AS `a` WHERE `a`.`state` = 1442μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:466Copy
  • SELECT `alias` FROM `l8uf4_content` WHERE `id` = :id342μs1.31KBParams/components/com_content/src/Service/Router.php:168Copy
  • SELECT m.item_id as id, m.item_id, m.description as metadescription, m.description, m.title as metatitle, m.title FROM l8uf4_osmeta_metadata m WHERE m.item_id='245' AND m.item_type='4'186μs816B/administrator/components/com_osmeta/library/Free/Container/AbstractContainer.php:140Copy
  • SELECT `session_id` FROM `l8uf4_session` WHERE `session_id` = ?196μs3.5KBParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:291Copy
  • UPDATE `l8uf4_session` SET `data` = ? , `time` = ? WHERE `session_id` = ?4.96ms592BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:318Copy