Analyzing The Structural Properties Of Pulmonary Arterial Networks, 2019 North Carolina State University at Raleigh
Analyzing The Structural Properties Of Pulmonary Arterial Networks, Megan J. Chambers
Biology and Medicine Through Mathematics Conference
No abstract provided.
Using Peripheral Venous Pressure Waveforms To Predict Key Hemodynamic Parameters, 2019 University of Arkansas, Fayetteville
Using Peripheral Venous Pressure Waveforms To Predict Key Hemodynamic Parameters, Ali Zohair A Alalawi
Theses and Dissertations
Analysis of peripheral venous pressure (PVP) waveforms is a novel method of monitoring intravascular volume. Two cohorts were used to study the hemodynamics change of the body state and its influence on the PVP using (1) dehydration setting with infants suffering from pyloric stenosis and (2) hemorrhage setting during a craniosynostosis elective surgery. The goal of this research is to develop a minimally invasive method of analyzing the PVP waveforms and find correlations with volume loss.
Twenty-three pyloric stenosis patients PVP were acquired at five stages and were divided into euvolemic, normal fluid volume, and hypovolemic, significant fluid loss. Seven ...
A Perfusion Decellularization Heart Model - An Interesting Tool For Cell-Matrix Interaction Studies, 2019 Fundeni Clinical Institute of Bucharest, Department of Cardiovascular Surgery, Bucharest, Romania
A Perfusion Decellularization Heart Model - An Interesting Tool For Cell-Matrix Interaction Studies, Mihai Meșină, Ion Mîndrilă, Cristian Mesina, Cosmin Vasile Obleagă, Octavian Istrătoaie
Journal of Mind and Medical Sciences
Objective. In this paper, we present a technique for whole human, pig, or rat heart decellularization in order to obtain a tool for cell-matrix interaction studies and to obtain the extracellular matrix scaffold with applications to the study of cardiac connective tissue architecture for tissue bioengineering.
Material and methods. In order to achieve tissue decellularization we present two separate protocols, the first for large animal hearts (e.g., pig hearts) and human hearts, the second for smaller hearts (e.g., rat hearts). We have performed the cardiac decellularization technique on 20 pig hearts, 5 human hearts, and 20 rat hearts ...
Aortoduodenal Fistula Forms From Primary Aortic Stump Graft In A Two-Time Multi-Visceral Transplant Patient With Presentation Of Gastrointestinal Bleed And Bowel Perforation: A Case Report, 2019 Duquesne University
Aortoduodenal Fistula Forms From Primary Aortic Stump Graft In A Two-Time Multi-Visceral Transplant Patient With Presentation Of Gastrointestinal Bleed And Bowel Perforation: A Case Report, Brielle Corrente
Graduate Student Research Symposium
Usually not diagnosed until open laparotomy, aortoduodenalfistulas (ADF) are one of the rarest complications of intestinal transplant surgery. With an incidence rate of only 0.04% at autopsy and only 250 documented cases since the early 1800’s, aortoduodenal fistulas are the most deadly complications of intestinal transplantation with a mortality rate of 100% without surgical intervention. A 39 year old, two-time multi-visceral transplant African American female patient suffered from a primary aortoduodenal fistula formation in a primary modified multi-visceral transplant aortic stump graft site. With emergency open laparotomy repair, revascularization of the secondary multi-visceral transplant was performed, saving the ...
An Anatomical And Functional Analysis Of Digital Arteries, 2019 University of Lynchburg
An Anatomical And Functional Analysis Of Digital Arteries, Katie Highsmith
Student Scholar Showcase
Blood flow to the tissue of the hands and digits is efficiently regulated by vasoconstriction and vasodilation. Through a series of cadaveric dissection, we examined arteries in the hands and digits, including ulnar artery, radial artery, palmar arteries, and digital arteries, for their distribution (branching) patterns and morphological parameters (e.g., thickness, length between branches, external and internal diameters). Using data directly collected from three female cadavers as input variables to our mathematical model, we simulated vasoconstriction (-20% and -10% diameter) and vasodilation (+10% and +20 diameter) to evaluate the extent of changes in blood volume and flow within the ...
Arterial Distribution Of The Human Aorta: An Examination Of The Evolutionary, Developmental, And Physiological Bases Of Asymmetry., Brandon Oddo, Cooker Storm
Seaver College Research And Scholarly Achievement Symposium
The study of anatomy contends that “form follows function”; a disciplinary theme purporting that anatomical structures (i.e., cells, tissues, and organs) have a shape that serves its proper function. With this in mind, it is unclear why human arterial distribution off the aortic arch is asymmetrical, while the corresponding venous anatomy is symmetrical. We investigated the evolutionary, developmental, and physiological bases for the asymmetry of aortic arch branches in humans. First, we investigated the cardiovascular anatomy of ancestral species to determine if, and at what level, anatomical divergence (from aortic symmetry to asymmetry) occurs. Second, we examined the formation ...
Session 1 - Cardiovascular System, 2019 Thomas Jefferson University
Session 1 - Cardiovascular System, Skmc Surface Anatomy
- Highlight surface anatomy projections and understand their relationship with gross anatomy.
- Review auscultation and location of heart sounds. Be well acquainted with APTM-2245.
- Understand what cardiac tamponade is and how surface anatomy informs your procedure to fix it.
Oral Saline Consumption And The Exercise Pressor Reflex, 2019 Montclair State University
Oral Saline Consumption And The Exercise Pressor Reflex, John J. Del Vecchio, Evan L. Matthews Dr., Peter A. Hosick Dr.
The Volume Pilot Study data represents information from participants' health history questionnaire and measurements of changes in blood pressure, heart rate, hemoglobin, hematocrit, serum sodium, and plasma volume during blood draws taken every 30 minutes for 3 hours.
The HG and CPT information was taken in the second part of the study. This data includes participant demographics and various cardiovascular measurements taken during baseline (5min), handgrip exercise (2min), post-exercise ischemia (2min), and recovery (2min). It also includes cardiovascular measurements taken during the cold pressor test which includes baseline (2min), cold pressor test (2min), and recovery (2min)
Brain Neurotransmitters, Cognitive Control, And Resting Heart Rate Variability (Rhrv) In The Mri Environment, 2019 University of Colorado, Boulder
Brain Neurotransmitters, Cognitive Control, And Resting Heart Rate Variability (Rhrv) In The Mri Environment, Max Povejsil
Undergraduate Honors Theses
Determining reliable measures that show how the brain can regulate the body and its physiological states could offer insight into how mental health and wellbeing is related to physiology and self-regulation. This study investigates how heart rate variability (HRV) at rest (rHRV), a measure of autonomic nervous system activity according to several studies (Thayer 2009, Colzato 2017, Shaffer & Ginsberg, 2017), relates to neurotransmitter levels in the prefrontal cortex (PFC), cognitive control over emotional material, and individual traits involved in psychopathology. Resting heart rate (HR) measures were taken via pulse rate measurements in an MRI scanner, and processed into rHRV. Prior ...
Effects Of Acute Hypoxia On Danio Rerio, 2019 The University of Akron
Effects Of Acute Hypoxia On Danio Rerio, Karly Crail
Williams Honors College, Honors Research Projects
The purpose of this research experiment was to determine the effects of acute hypoxia on the embryonic zebrafish (Danio rerio) cardiovascular system and assess the critical oxygen level at which embryonic function is compromised. This goal was achieved by exposing embryos to decreasing oxygen concentrations, (6.0 mg/L-0 mg/L) and observing the heart under an inverted microscope. Data analysis was conducted to determine end systolic volume, end diastolic volume, stroke volume, heart rate, and cardiac output. It was hypothesized that hypoxia would stimulate cardiac activity, because in early developmental stages, tissues are supplied with oxygen through bulk diffusion ...
Three-Dimensional Echocardiographic Analysis Of The Equine Aortic Valve, 2019 University of New Hampshire, Durham
Three-Dimensional Echocardiographic Analysis Of The Equine Aortic Valve, Amber Mcelhinney
Honors Theses and Capstones
This research focused on 3D echocardiography of the aortic valve (AV) in horses. Aortic regurgitation (AR) can be a common finding in older horses, and in severe cases can result in decreased performance and even sudden cardiac death. Standard AR diagnosis includes 2D echocardiography from the right side of the horse. Three-dimensional echocardiography (3DE) records a pyramid of tissue, showing structures in the heart difficult to visualize in 2D methods, and can be more accurate as it does not rely as heavily on placement of the transducer. Nine images of normal AV’s were assessed, and still frames of anatomical ...
Equalization Of Four Cardiovascular Risk Algorithms After Systematic Recalibration: Individual-Participant Meta-Analysis Of 86 Prospective Studies, Lisa Pennells, Stephen Kaptoge, Angela Wood, Mike Sweeting, Xiaohui Zhao, Ian White, Stephen Burgess, Peter Willeit, Thomas Bolton, Karel G. M. Moons, Yvonne T. Van Der Schouw, Randi Selmer, Kay-Tee Khaw, Vilmundur Gudnason, Gerd Assman, Philippe Amouyel, Veikko Salomaa, Mika Kivimaki, Borge G. Nordestgaard, Michael J. Blaha, Lewis H. Kuller, Hermann Brenner, Richard F. Gillum, Christa Meisinger, Ian Ford, Matthew W. Knuiman, Annika Rosengren, Debbie A. Lawlor, Henry Volzke, Cyrus Cooper, Alejandro Marin Ibañez, Edoardo Casiglia, Jussi Kauhanen, Jackie A. Cooper, Beatriz Rodriguez, Johan Sundstrom, Elizabeth Barrett-Connor, Rachel Dankner, Paul J. Nietert, Karina W. Davidson, Robert B. Wallace, Dan G. Blazer, Cecilia Bjorkelund, Chiara Donfrancesco, Harlan M. Krumholz, Aulikki Nissinen, Barry R. Davis, Sean Coady, Peter H. Whincup, Torben Jorgensen, Pierre Ducimetiere, Maurizo Trevisan, Gunnar Engstrom, Carlos J. Crespo, Tom W. Meade, Marjolein Visser, Daan Kromhout, Stefan Kiechl, Makoto Daimon, Jackie F. Price, Agustin Gomez De La Camara, J. Wouter Jukema, Benoit Lamarche, Altan Onat, Leon A. Simons, Maryam Kavousi, Yoav Ben-Shlomo, John Gallacher, Jacqueline M. Dekker, Hisatomi Arima, Nawar Shara, Robert W. Tipping, Ronan Roussel, Eric J. Brunner, Wolfgang Koenig, Masaru Sakurai, Jelena Pavlovic, Ron T. Gansevoort, Dorothea Nagel, Uri Goldbourt, Elizabeth L. M. Barr, Luigi Palmieri, Inger Njolstad, Shinichi Sato, W. M. Monique Verschuren, Cherian V. Varghese, Ian Graham, Oyere Onuma, Philip Greenland, Mark Woodward, Majid Ezzati, Bruce M. Psaty, Naveed Sattar, Rod Jackson, Paul M. Ridker, Nancy R. Cook, Ralph B. D'Agostino Sr., Simone G. Thompson, John Danesh, Emanuele Di Angelantonio
Publications and Research
Aims: There is debate about the optimum algorithm for cardiovascular disease (CVD) risk estimation. We conducted head-to-head comparisons of four algorithms recommended by primary prevention guidelines, before and after ‘recalibration’, a method that adapts risk algorithms to take account of differences in the risk characteristics of the populations being studied.
Methods & Results: Using individual-participant data on 360737 participants without CVD at baseline in 86 prospective studies from 22 countries, we compared the Framingham risk score (FRS), Systematic COronary Risk Evaluation (SCORE), pooled cohort equations (PCE), and Reynolds risk score (RRS). We calculated measures of risk discrimination and calibration, and modelled ...
Waardenburg Syndrome And Left Persistent Superior Vena Cava, 2018 University of Kentucky
Waardenburg Syndrome And Left Persistent Superior Vena Cava, Driss Raissi, Alexander Christie, Kimberly Applegate
Radiology Faculty Publications
Waardenburg syndrome (WS) is a rare genetic disorder secondary to neural crest cell developmental abnormalities. It is predominantly described as an auditory-pigmentary syndrome with diverse patient presentation, typically involving congenital sensorineural hearing loss and pigmentation abnormalities of the skin, hair, and iris. Other developmental abnormalities that may be associated with this syndrome are Hirschsprung's disease and a myriad of cardiovascular congenital defects. We present a case of a young girl with WS who found to have a persistent left superior vena cava (PLSVC) draining into the coronary sinus. The prevalence of PLSVC is increased in patients with chromosomal and ...
Identification Of New Genes In Congenital Heart Defects, 2018 University of Georgia
Identification Of New Genes In Congenital Heart Defects, Naomi Siddiquee
Georgia Undergraduate Research Conference (GURC)
Tetralogy of Fallot (TOF) is the most common form of cyanotic congenital heart disease, occurring in 1 in 3000 live births. TOF is a combination of four heart defects that affect normal blood flow. Shone’s Syndrome is another rare congenital heart disease consisting of left-sided obstructive heart lesions. Although the diagnosis of both diseases is confirmed by clinical evaluation and physical examination, their pathogenesis is unknown. This research aimed to identify and characterize new genetic variants in hereditary cardiac diseases, specifically Tetralogy of Fallot and Shone’s Syndrome. Exome sequencing identified 20 nucleotide variants in different genes among TOF ...
Hyperhomocysteinemia As A Risk Factor For Vascular Contributions To Cognitive Impairment And Dementia, 2018 University of Kentucky
Hyperhomocysteinemia As A Risk Factor For Vascular Contributions To Cognitive Impairment And Dementia, Brittani R. Price, Donna M. Wilcock, Erica M. Weekman
Physiology Faculty Publications
Behind only Alzheimer’s disease, vascular contributions to cognitive impairment and dementia (VCID) is the second most common cause of dementia, affecting roughly 10–40% of dementia patients. While there is no cure for VCID, several risk factors for VCID, such as diabetes, hypertension, and stroke, have been identified. Elevated plasma levels of homocysteine, termed hyperhomocysteinemia (HHcy), are a major, yet underrecognized, risk factor for VCID. B vitamin deficiency, which is the most common cause of HHcy, is common in the elderly. With B vitamin supplementation being a relatively safe and inexpensive therapeutic, the treatment of HHcy-induced VCID would seem ...
Editorial: Ion Channel Trafficking And Cardiac Arrhythmias, 2018 University Medical Center Utrecht, Netherlands
Editorial: Ion Channel Trafficking And Cardiac Arrhythmias, Marcel A. G. Van Der Heyden, Brian P. Delisle, Hugues Abriel
Physiology Faculty Publications
No abstract provided.
Myocyte [Na+]I Dysregulation In Heart Failure And Diabetic Cardiomyopathy, 2018 University of Kentucky
Myocyte [Na+]I Dysregulation In Heart Failure And Diabetic Cardiomyopathy, Sanda Despa
Pharmacology and Nutritional Sciences Faculty Publications
By controlling the function of various sarcolemmal and mitochondrial ion transporters, intracellular Na+ concentration ([Na+]i) regulates Ca2+ cycling, electrical activity, the matching of energy supply and demand, and oxidative stress in cardiac myocytes. Thus, maintenance of myocyte Na+ homeostasis is vital for preserving the electrical and contractile activity of the heart. [Na+]i is set by the balance between the passive Na+ entry through numerous pathways and the pumping of Na+ out of the cell by the Na+/K+-ATPase. This equilibrium is perturbed in heart failure, resulting in higher [Na+]i. More recent studies have revealed that ...
Effects Of Reproductive Period Duration And Number Of Pregnancies On Midlife Ecg Indices: A Secondary Analysis From The Women's Health Initiative Clinical Trial, 2018 University of California, San Francisco
Effects Of Reproductive Period Duration And Number Of Pregnancies On Midlife Ecg Indices: A Secondary Analysis From The Women's Health Initiative Clinical Trial, Nisha I. Parikh, Kristopher Kapphahn, Haley Hedlin, Jeffrey E. Olgin, Matthew A. Allison, Jared W. Magnani, Kelli R. Ryckman, Molly E. Waring, Marco Valentin Perez, Barbara V. Howard
Open Access Articles
OBJECTIVES: Pregnancy, menses and menopause are related to fluctuations in endogenous sex hormones in women, which cumulatively may alter cardiac electrical conduction. Therefore, we sought to study the association between number of pregnancies and reproductive period duration (RD, time from menarche to menopause) with ECG intervals in the Women's Health Initiative Clinical Trials.
DESIGN: Secondary analysis of multicentre clinical trial.
PRIMARY OUTCOME MEASURES: ECGintervals: PR interval, P-wave duration, P-wave dispersion, QTc interval.
PARTICIPANTS: n=40 687 women (mean age=62 years) participating in the Women's Health Initiative Clinical Trials. 82.5% were white, 9.3% black ...
Identifying The 5’End Of The Camta1 Genes In Zebrafish, 2018 Brigham Young University
Identifying The 5’End Of The Camta1 Genes In Zebrafish, Morgan Fronk
Undergraduate Honors Theses
Congenital heart diseases (CHDs) are a significant cause of infant death and are frequently caused by mutations in transcription factors. Camta1 (calmodulin binding transcription activator 1) is a transcription factor that has been proposed as a modulator in embryonic heart development and a possible cause of CHDs. The only other known member of its family in vertebrates is involved in activating a hypertrophy gene program in adult heart failure. Unlike camta2, camta1 is expressed in the embryonic heart during heart looping. However, few studies have been done on camta1. In zebrafish, there are two camta1 ohnologs (homologs created through a ...
Artificial Gravity As A Countermeasure To The Cardiovascular Deconditioning Of Spaceflight: Gender Perspectives, 2018 University of Kentucky
Artificial Gravity As A Countermeasure To The Cardiovascular Deconditioning Of Spaceflight: Gender Perspectives, Joyce M. Evans, Charles F. Knapp, Nandu Goswami
Biomedical Engineering Faculty Publications
Space flight-induced physiological deconditioning resulting from decreased gravitational input, decreased plasma volume, and disruption of regulatory mechanisms is a significant problem in returning astronauts as well as in normal aging. Here we review effects of a promising countermeasure on cardiovascular systems of healthy men and women undergoing Earth-based models of space-flight. This countermeasure is produced by a centrifuge and called artificial gravity (AG). Numerous studies have determined that AG improves orthostatic tolerance (as assessed by various protocols) of healthy ambulatory men, of men deconditioned by bed rest or by immersion (both wet and dry) and, in one case, following spaceflight ...