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Flashcards in HILL - Cardiovascular Shock Deck (15)
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1

what is shock

A condition where oxygen delivery fails to
meet the metabolic requirements of
metabolizing body tissues

2

what are the 2 main overall causes of shock

1) LOW STROKE VOLUME

2) LOW PERIPHERAL ARTERIOLAR RESISTANCE
(VASODILATION)

3

what are the 3 caues of cardiogenic shock

1. Myocardial Infarction

2. Acute Mitral Regurgitation

3.Arrhythmias

4

What are the 3 main causes of hypovolemic shock

reduce edv will reduce stroke vol

1. Hemorrhage

2. Severe Burns

3. Salt and Water Depletion

5

What are the 3 main causes of obstructive shock these all reduce edv

1. Pulmonary Embolism
2. Cardiac Tamponade
3. Pneumothorax

6

what are 3 causes of vasodialation

1. Sepsis
2. Anaphylactic
3. Neurogenic- loss of sympathetics they will have warm limbs cold core

7

A person has a severe hemmorage what are the 3 compensatory mechanisms that will occur

Baroreceptor - increased sympatheitic flow leads to increased HR, contractility and cardiac output. constriction of arteriorles leads to incrased TPR and constriction of veins leads to increased venus return

In the renin angiotensin system there will be an increase in angiotensin II which leads to increased aldosterone and therefore more Na resoption which leads to higher blood volume. There is alos incrassed TPR

In the capillaries there will be more fluid absorption which leads to increased blood volume

8

what are 3 other things that exacerbate progression of shock

1. Deterioration of vasomotor centers in brain

2. Acidotic conditions in peripheral organs brought on by
poor oxygenation as well as release of toxins from
deteriorating tissues promote arterial blood clotting and
worsen already reduced tissue oxygen delivery

3. Acidosis and toxins also increase capillary permeability
which enhances fluid loss from the vascular compartment

9

What is the most important factor involved in the progression of shock

DETERIORATION OF CARDIAC FUNCTION

10

What is treatment for cardiogenic shock

Administration of inotropic agents to
increase myocardial contractility, stroke
volume, and cardiac output

11

what is treatment for hypovolemic shock

Hypovolemic:
• Administration of fluids

• Blood transfusion (hemorrhage) (if
hemoglobin concentration falls below 10
g/dl)

12

What is treatment for obstructive shock

Administration of anticoagulants involving
low molecular weight heparin (LMWH) or
warfarin (except in those with recent surgery,
hemorrhagic stroke, or active bleeding)

• Thrombolytic therapy

13

What is the treatment for sepsis

1. Antibiotics

2. Administration of fluids

• In severe cases of wound infection,
debridement and/or drainage

14

What is treatment for anaphylactic shock

Administration of epinephrine to counteract
histamine-induced arteriolar vasodilation
and capillary filtration

15

distributive shock is also known as

vasodialation