Results 11 to 20 of about 63,017 (257)

Effect of Artificial Pacing of the Heart on Cardiac and Renal Function [PDF]

open access: bronzeCirculation, 1967
Six patients with complete heart block provided an opportunity to study renal hemodynamic responses to increases in heart rate produced by an artificial pacemaker. Observations were made at rest and following exercise during idioventricular rhythm and slow rates and were repeated after increasing the rate to 70/min by means of an artificial pacemaker ...
J. O’Neal Humphries   +3 more
openalex   +3 more sources

Ventricular synchrony in artificial cardiac pacing: The role of the helical myocardium and fulcrum in the electromechanical coupling of the heart

open access: hybrid, 2023
About 30% of patients with Heart Failure (HF) have wide QRS complexes. In left bundle branch block (LBBB), the electromechanical activation sequence in the Left Ventricle (LV) is asynchronous with deterioration of pump function, higher frequency of hospitalizations and mortality.
Alejandro Ventura   +2 more
openalex   +3 more sources

Mathematical models and artificial intelligence for studying the ventricular dyssynchrony and improving the effectiveness of cardiac resynchronization therapy

open access: yesРоссийский кардиологический журнал
The review is devoted to the current status of artificial intelligence (AI), mathematical modeling (MM) and their combination in the analysis of cardiac dyssynchrony mechanisms and its treatment using cardiac resynchronization therapy (CRT).
T. M. Nesterova   +3 more
doaj   +2 more sources

Designing of intelligent PID controller for cardiac pacemaker using artificial bee colony algorithm

open access: yesSystems Science & Control Engineering
For real-time patient heart rate management, most widely used biomedical implantable devices in the cardiovascular system is the cardiac pacemaker (CP).
Vandana Dubey   +3 more
doaj   +2 more sources

Fetal Tachyarrhythmia - Part II: Treatment [PDF]

open access: yes, 2004
The decision to initiate pharmacological intervention in case of fetal tachycardia depends on several factors and must be weighed against possible maternal and/or fetal adverse effects inherent to the use of antiarrhythmics. First, the seriousness of the
Meijboom, Erik J   +2 more
core   +16 more sources

The relation between cardiac 123I-mIBG scintigraphy and functional response 1 year after CRT implantation [PDF]

open access: yes, 2020
Cardiac resynchronization therapy (CRT) is a disease-modifying therapy in patients with chronic heart failure (CHF). Current guidelines ascribe CRT eligibility on three parameters only: left ventricular ejection fraction (LVEF), QRS duration, and New ...
de Groot, J R   +7 more
core   +1 more source

Phenylephrine-Induced Cardiovascular Changes in the Anesthetized Mouse: An Integrated Assessment of in vivo Hemodynamics Under Conditions of Controlled Heart Rate

open access: yesFrontiers in Physiology, 2022
ObjectiveInvestigating the cardiovascular system is challenging due to its complex regulation by humoral and neuronal factors. Despite this complexity, many existing research methods are limited to the assessment of a few parameters leading to an ...
Rajkumar Rajanathan   +4 more
doaj   +1 more source

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