Week 2 recorded cardio vascular part 2 Flashcards
What is Heart Failure?
A physiological state where cardiac output is
insufficient to meet the needs of the body.
Heart failure can be a problem with structure or
function of the heart.
Causes of Heart Failure:
▶ Coronary Artery Disease (CAD)
▶ Atherosclerosis
▶ Tobacco
▶ Elevated Lipids
▶ Diet
▶ Sedentary
▶ Uncontrolled Hypertension
▶ Myocardial Infarction
▶ Renal Dysfunction
▶ Volume Overload
▶ Cardiomyopathy
▶ Diabetes Mellitus
▶ Heart Valve Disorders
Cardiac Output (CO)
▶ Volume of blood pumped throughout the body per minute.
▶ Heart Rate X Stroke Volume = CO (Liters / Minute)
▶ Normal CO necessary to maintain tissue perfusion.
▶ TIME IS TISSUE: Decreased perfusion = cellular death (Infarction)
▶ Cellular Death and Cardiogenic Shock
▶ Preload =
▶ Afterload=
Volume of blood in ventricles at end of diastole.
▶ Volume of blood received back to the heart.
▶ Preload is the amount ventricles stretch at end of diastole.
▶ Relaxation and filling phase.
▶ AV valves (mitral and tricuspid) are wide open
▶ Afterload = Resistance left ventricle must overcome to eject and
circulate blood.
▶ Afterload is the squeeze.
▶ Pressure opens semilunar valves (pulmonic and aortic) to push
blood out through circulation. Right to lungs, left to peripheral.
▶ Affected by Systemic Vascular Resistance (SVR)
Preload
▶ To increase preload (which will increase stroke volume and cardiac output):
▶ To decrease preload:
Preload
▶ To increase preload (which will increase stroke volume and cardiac output):
▶ ie. Hypovolemic Shock
▶ IV Fluids
▶ Stimulate SNS
▶ To decrease preload:
▶ ie. Fluid Overload in HF
▶ Diuretics
▶ Vasodilation
Afterload
▶ To increase afterload:
▶ To decrease afterload:
Afterload
▶ To increase afterload:
▶ ie. Aortic Stenosis
▶ ie. Pulmonary HTN
▶ Increase Vasoconstriction
▶ To decrease afterload:
▶ Vasodilators to decrease vascular resistance.
Ejection Fraction
Ejection Fraction
Measurement in percentage of total blood volume that the
left ventricle pumps out with each contraction
The right side Heart failure
The right ventricle plays
a supporting yet
important role in
circulation.
▶ Sends deoxygenated
blood into the lungs for
oxygenation and then
back to the left side of
the heart.
▶ Systolic failure.
▶ A contraction problem
The left ventricle failure
The left ventricle is the
powerhouse of the heart.
▶ Sends oxygenated blood
out to the peripherals.
▶ Diastolic failure.
▶ A relaxation problem
Acute =
decompensated =
heart=
failure=
Acute = Sudden in onset, severe
▶ Decompensated = Deterioration of a structure or system previously
working with the help of compensatory mechanisms
▶ Heart = Organ that functions to circulate blood and perfuse tissue.
▶ Failure = A state of insufficiency or declined performance leading to
dysfunction of a body system (cardiovascular) or organ (heart)
Acute Decompensated Heart Failure (ADHF)
Acute Decompensated Heart Failure (ADHF)
▶ Increased Respiratory Rate
▶ Fluid Shift and Interstitial Edema
▶ Tachypnea and SOB
▶ Pulmonary Edema with Hemoptysis
▶ Crackles
▶ Tachycardia
▶ Hypotension
▶ Severe Dyspnea
▶ Orthopnea
▶ Use of Accessory Muscles to Breathe
What is Pulmonary Edema?
▶ aka Pulmonary Congestion
▶ Liquid Accumulation
▶ Tissue
▶ Alveoli
▶ Concerns:
▶ Impaired Gas Exchange
▶ Acute Respiratory Failure
ventilatory Support
▶ Nasal Cannula
▶ 6L Max up to 44% FIO2
▶ Simple Face Mask
▶ 10L Max up to 60% FIO2
▶ Non-Rebreather Mask
▶ 15L Max up to 100% FIO2
▶ VapoTherm
▶ 40L Max with 100% FIO2
▶ BiPap
▶ Rate 10-12 breaths per minute, 100% FIO2.
▶ Endotracheal (ET) Intubation
▶ Full Ventilatory Support for those unable to maintain airway
Chest X-Ray:
Fluid in lungs
Enlarged Heart
▶ Fluid in lungs - Pulmonary Edema
▶ Enlarged Heart - Pulmonary Arterial Hypertension
▶ Air Between Lung/Chest Wall - Pneumothorax
▶ Infiltrates (blood, pus) - Pneumonia
BNP (brain natriuretic peptide)
aka B-type natriuretic peptide
▶ Hormone secreted by cardiomyocytes in the heart
ventricles in response to stretching caused by
increased ventricular blood volume.
▶ Normal Range = <100 pg/mL
What other labs would be important?
▶ Cardiac Biomarkers
▶ Troponins
▶ CK-MB
▶ Myoglobin
▶ Renal Function
▶ BUN and Serum Creatinine
▶ Electrolytes
▶ Especially Potassium, Magnesium
