CAD Flashcards
supplies oxygenated blood to the (posterior portion) back portion of the left atrium & ventricle
Left Circumflex Artery (LCA)
supplies oxygenated to the front portion of the ventricle to the septum of the heart
Left Anterior Descending Artery (LDA)
— supply oxygenated blood to the front portion of the right atrium
Right Marginal Artery (RMA)
supply oxygenated blood to the back poriton of the right ventricle
Posterior Descending Artery
form re-route when there is blockage so that the blood can reach other parts of the artery
collateral circulation
Vascular supply to the heart is impended by
Atheroma
Thrombosis
Spasm of the coronary artery
Accumulated fatty deposits and scar tissues
Atheroma
Atheroma leads to ________ and risk of ________
restriction in blood flow; thrombosis
patchy deposit of plaque
atheromas or atherosclerotic plaque
condition in which patchy deposit of plaque
(atheromas or atherosclerotic plaque) develop in the
wall of the medium and large sized arteries, leading to
reduced or blocked blood flow
Atherosclerosis
Atherosclerosis is a condition in which patchy deposit of plaque
(atheromas or atherosclerotic plaque) develop in the
wall of the medium and large sized arteries, leading to
reduced or blocked blood flow
T/F: Atherosclerosis can lead to stroke (in brain)
T
rupture, causing thrombosis
Unstable plaque
What do you give to patients with unstable plaque?
give antiplatelet medication just in case of rupturee (lead to coagulation/platelet adhesion)
T/F: Plaque rupture can cause MI
T
Blood clot
Thrombus
Fragment of blood clot travelling through vein
Emboli
Risk factors for CAD
atherosclerosis, htn, high cholesterol, diabetes, obesity, smoking + alcohol consumption
Etiology of CAD: Decrease blood flow to the myocardium
*Atherosclerosis
*Coronary spasm
*Traumatic Injury
*Embolic event
Etiology of CAD: Increased oxygen demand
*Diastole
*Systole
*Contractile state of the heart
*Increase in systolic wall tension
* Lengthening of ejection time
*Change in the heart rate
unbalanced oxygen supply and oxygen demand
Myocardial Ischemia
T/F: during MI, px can experience angina pectoris (chest pain)
T
Oxygen demand exceeds myocardial oxygen
supply
Myocardial Ischemia
Myocardial Ischemia may be silent if
the length is insufficient
* Afferent cardiac nerves are damages
* Inhibition of pain at the spinal or
supraspinal
Occurs when oxygen demand exceeds the oxygen supply
Myocardial Ischemia
T/F: during Myocardial infarction, heart muscles already died due lack of oxygenated blood for a long time
T
Transient chest discomfort that are
attributed to insufficient myocardial oxygen
Angina
Ordinary activity does not cause angina, such as walking and climbing stairs
Class I
Slight limitation of ordinary activity
Class II
Marked limitation of ordinary physical activity
Class III
Inability to carry on any physical activity without discomfort
Class IV
T/F: not all chest pain is classified as angina
T
Characterized by chest pain and breathlessness
on exertion, symptoms are relieved promptly
with rest
Stable Angina
Patient has a reproducible pattern of pain or
other symptoms
Stable Angina
Components to Consider in Anginal Pain
1.Quality of pain (suffocating type of pain)
2.Location of pain (chest pain)
3.Duration of pain (0.5 to 30 minutes)
4.Factor provoking pain
5.Factors that relieve pain
Symptoms of Stable Angina
Pressure over the sternum but not
always radiating
Pain usually lasting for 0.5 to 30 minutes
Precipitating factors include exercise, cold weather,
emotional stress
Relief occurs with rest and nitroglycerin
> 20 minutes occurring within a week of
presentation
Rest Angina
Previously diagnosed angina with distinctly more
frequency, longer duration or lower threshold
Increasing angina
-Rest Angina
-Increasing Angina
-decrease response to NTG
Unstable Angina
Nocturnal angina
Angina Decubitus
Angina Decubitus occurs when patient is in a
recumbent position
Coronary artery spasm that reduces blood flow
Prinzmetal Angina