or
Search Language
Browse
Medical Illustrations
Medical Exhibits
Medifocus Guides
Most Recent Uploads
Body Systems/Regions
Anatomy & Physiology
Diseases & Conditions
Diagnostics & Surgery
Cells & Tissues
Cardiovascular System
Digestive System
Integumentary System
Nervous System
Reproductive System
Respiratory System
Back and Spine
Foot and Ankle
Head and Neck
Hip
Knee
Shoulder
Thorax
Medical Specialties
Cancer
Cardiology
Dentistry
Editorial
Neurology/Neurosurgery
Ob/Gyn
Orthopedics
Pediatrics
Account
Administrator Login

Left Sided Heart Failure - Medical Animation

 

Need Additional Information?

Item #ANM10003 — Source #1313

Order by phone: (407) 260-1038

Order by email: sales@letech.tv

Left Sided Heart Failure - Medical Animation
MEDICAL ANIMATION TRANSCRIPT: In left-sided heart failure, the left ventricle cannot pump an adequate amount of blood, a volume known as preload, out of the heart. This condition causes pulmonary congestion, a build up of blood in the pulmonary vessels causes fluid in lung tissues that impedes normal respiration. Systolic left-sided heart failure describes the left ventricle's inability to contract with enough force to drive blood out of the heart against resistance called afterload to the rest of the body. After a left ventricular contraction, the blood left behind in the chamber causes blood to back up into the left atrium and pulmonary circulation, leading to pulmonary congestion. Diastolic left-sided heart failure describes the inability of the left ventricle to expand sufficiently to accommodate oxygenated blood entering from the left atrium. In this condition, the left ventricle contracts with normal force, but the blood volume that is pumped out is insufficient to meet the body's needs. Long standing diseases such as coronary artery disease, hypertension, and diabetes can thicken and stiffen the ventricular muscle, making it a non-compliant, inefficient pump. As a result of reduced myocardial contractility, the unexpelled blood pools inside the left ventricle, and the chamber expands to hypertrophic size. This hypertrophy of the heart muscle results in the insufficient delivery of nutrients and oxygen to tissues. In both systolic and diastolic left-sided heart failure, the build up of unexpelled blood increases pressure in the pulmonary circulation causing serosanguineous fluid to seep into the alveoli and interstitium. This fluid build up is heard as crackles and rhonchi when the lungs are auscultated. As the lungs saturate with fluid, patients may develop difficulty of breathing called dyspnea, trouble breathing while lying flat called orthopnea, or rapid breathing called tachypnea. The heart rate increases to compensate for the left ventricles weakened state, which in time leads to thickening the myocardium as it labors to push blood out of the heart against the increasing pressure in the pulmonary vessels and fluid in the lungs and continuing the cycle of cardiac muscle damage. Treatment for heart failure involves changes in lifestyle such as diet and exercise, medication, surgery, or a combination of approaches. Medications commonly prescribed for heart failure include diuretics, which reduce fluid volume and venous return by inhibiting sodium and water reabsorption along the kidney's renal tubular system, ACE inhibitors, which block hormones in the renin-angiotensin aldosterone system, dilating vessels, lowering blood volume and venous return, decreasing the heart's workload, and halting ventricular hypertrophy, digoxin, a cardiac glycoside medication that increases the force of myocardial contractility by raising intracellular sodium and calcium concentrations, and beta-blockers, which compete with norepinephrine molecules for binding sites on cardiomyocytes, preventing norepinephrine's effects, resulting in reduced speed and strength of the contractions, which can support more efficient circulation through the body. ♪ [music] ♪

YOU MAY ALSO WANT TO REVIEW THESE ITEMS:
Right Sided Heart Failure
Right Sided Heart Failure - ANM10006
Medical Animation
Add to my lightbox
Find More Like This
Hypoplastic Left Heart Syndrome
Hypoplastic Left Heart Syndrome - exh5810
Medical Exhibit
Add to my lightbox
Find More Like This
Classic Heart w/ Left Ventricle Hypertrophy (LVH) 2-part
Classic Heart w/ Left Ventricle Hypertrophy (LVH) 2-part - G04
Anatomical Model
Add to my lightbox
Find More Like This
Male Torso with Post-accident Injuries to the Left Shoulder, Arm, Heart, Thorax and Kidneys
Male Torso with Post-accident Injuries to the Left Shoulder, Arm, Heart, Thorax and Kidneys - exh51297
Medical Exhibit
Add to my lightbox
Find More Like This
Heart Failure
Heart Failure - nhd00014
Medical Display
Add to my lightbox
Find More Like This
Normal Heart Anatomy vs Left Ventricular Hypertrophy
Normal Heart Anatomy vs Left Ventricular Hypertrophy - BP00041
Medical Illustration
Add to my lightbox
Find More Like This