Cards Test 2 Flashcards
HTN for which the cause is unknown
Essential hypertension
Normal blood pressure values
- SBP: < 120 and
- DBP: < 80
Prehypertension blood pressure values
SBP: 120-139
or
DBP: 80-89
Stage I HTN blood pressure values
SBP: 140-159
or
DBP: 90-99
Stage II HTN blood pressure values
SBP: > 160
or
DBP: > 100
When evaluating a patient for hypertension, what should you think if you hear flank abdominal or flank bruits?
HTN may be caused by renovascular HTN or renal artery stenosis?
When evaluating a patient for hypertension, what should you think if you detect absent or diminished femoral pulses?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if you palpate flank or abdominal masses?
HTN may be due to polycystic kidney disease or AAA
What physical signs might you expect to see in a patient with end organ damage from hypertension?
- Fundoscopic exam: AV nicking, arteriolar narrowing, exudates, papilledema, hemorrhages
- Signs of heart failure: S3, S4, laterally displaced PMI
- Neurologic deficits
Most causes of death fro mHTN have to do with complications of what?
Atherosclerosis
Primary organs/tissues that suffer from HTN
Heart Brain Kidneys Blood vessels Eyes
Lacunar stroke
occlusion of small penetrating brain arteries resulting in multiple tiny infarcts
Water-Shed stroke
generalized arterial narrowing that causes structural requirements for higher perfusion pressure in order to maintain adequate tissue flow; a sudden drop in BP can cause a CVA
Good marker for renal dysfunction in HTN
Microalbuninuria
Essential or Secondary HTN more common?
Essential (95%)
Medications that can cause hypertension
- OCP
- Glucocorticoids
- Cyclosporine
- Erythropoietin
- Sympathomimetic drugs (for colds)
Most common cause of secondary hypertension
Renal parenchymal disease
2 common causes of renal artery stenosis
- Atherosclerotic lesions
- Fibromuscular lesions
When evaluating a patient for hypertension, what should you think if you observe unexplained hypokalemia?
- Renovascular hypertension
- Or hyperaldosteronism
Gold standard for diagnosing renovascular hypertension
Renal angiography
If an aorta has coarcation, where is the coarctation likely located?
Just distal to the origin of the left subclavian artery
When evaluating a patient for hypertension, what should you think if you auscultate a midsystolic murmur that’s particularly loud over the back?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if the patient has “attacks” of severe, throbbing headaches, profuse sweating, and tachycardic palpitations?
Pheochromocytoma
When evaluating a patient for hypertension, what should you think if you observe Trousseau’s Sign?
Hyperaldosteronism
Tetanic muscle cramps of the hand distal to an inflated BP cuff
Trousseau’s sign
How do you differentiate between primary and secondary aldosteronism?
- Measure renin activity
- Low renin activity with primary
- High renin activity with secondary
Why might Cushing syndrome cause secondary HTN?
-Excessie cortisol increases blood volume and stimulates the synthesis of RAAS components
Dominant long-term controller of blood pressure
The kidneys via pressure natriuresis (PN)
What do chemoreceptors detect?
Changes in oxygen and carbon dioxide in the blood
What does the CNS respond to (in terms of blood pressure control)?
Ischemia of the vasomotor centers int he brain (the medulla oblongata)
Most powerful hormone system for regulating body volumes and BP
RAAS
BP Treatment goals
< 140/90
of < 130/80 w/ DM or chronic kidney disease
When evaluating a patient for hypertension, what should you think if you hear flank abdominal or flank bruits?
HTN may be caused by renovascular HTN or renal artery stenosis?
When evaluating a patient for hypertension, what should you think if you detect absent or diminished femoral pulses?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if you palpate flank or abdominal masses?
HTN may be due to polycystic kidney disease or AAA
What physical signs might you expect to see in a patient with end organ damage from hypertension?
- Fundoscopic exam: AV nicking, arteriolar narrowing, exudates, papilledema, hemorrhages
- Signs of heart failure: S3, S4, laterally displaced PMI
- Neurologic deficits
Most causes of death fro mHTN have to do with complications of what?
Atherosclerosis
Primary organs/tissues that suffer from HTN
Heart Brain Kidneys Blood vessels Eyes
Lacunar stroke
occlusion of small penetrating brain arteries resulting in multiple tiny infarcts
Water-Shed stroke
generalized arterial narrowing that causes structural requirements for higher perfusion pressure in order to maintain adequate tissue flow; a sudden drop in BP can cause a CVA
Good marker for renal dysfunction in HTN
Microalbuninuria
Essential or Secondary HTN more common?
Essential (95%)
Medications that can cause hypertension
- OCP
- Glucocorticoids
- Cyclosporine
- Erythropoietin
- Sympathomimetic drugs (for colds)
Most common cause of secondary hypertension
Renal parenchymal disease
2 common causes of renal artery stenosis
- Atherosclerotic lesions
- Fibromuscular lesions
When evaluating a patient for hypertension, what should you think if you observe unexplained hypokalemia?
- Renovascular hypertension
- Or hyperaldosteronism
Gold standard for diagnosing renovascular hypertension
Renal angiography
If an aorta has coarcation, where is the coarctation likely located?
Just distal to the origin of the left subclavian artery
When evaluating a patient for hypertension, what should you think if you auscultate a midsystolic murmur that’s particularly loud over the back?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if the patient has “attacks” of severe, throbbing headaches, profuse sweating, and tachycardic palpitations?
Pheochromocytoma
When evaluating a patient for hypertension, what should you think if you observe Trousseau’s Sign?
Hyperaldosteronism
Tetanic muscle cramps of the hand distal to an inflated BP cuff
Trousseau’s sign
How do you differentiate between primary and secondary aldosteronism?
- Measure renin activity
- Low renin activity with primary
- High renin activity with secondary
Why might Cushing syndrome cause secondary HTN?
-Excessie cortisol increases blood volume and stimulates the synthesis of RAAS components
Dominant long-term controller of blood pressure
The kidneys via pressure natriuresis (PN)
What do chemoreceptors detect?
Changes in oxygen and carbon dioxide in the blood
What does the CNS respond to (in terms of blood pressure control)?
Ischemia of the vasomotor centers int he brain (the medulla oblongata)
Most powerful hormone system for regulating body volumes and BP
RAAS
HTN for which the cause is unknown
Essential hypertension
Normal blood pressure values
- SBP: < 120 and
- DBP: < 80
Prehypertension blood pressure values
SBP: 120-139
or
DBP: 80-89
Stage I HTN blood pressure values
SBP: 140-159
or
DBP: 90-99
Stage II HTN blood pressure values
SBP: > 160
or
DBP: > 100
When evaluating a patient for hypertension, what should you think if you hear flank abdominal or flank bruits?
HTN may be caused by renovascular HTN or renal artery stenosis?
When evaluating a patient for hypertension, what should you think if you detect absent or diminished femoral pulses?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if you palpate flank or abdominal masses?
HTN may be due to polycystic kidney disease or AAA
What physical signs might you expect to see in a patient with end organ damage from hypertension?
- Fundoscopic exam: AV nicking, arteriolar narrowing, exudates, papilledema, hemorrhages
- Signs of heart failure: S3, S4, laterally displaced PMI
- Neurologic deficits
Most causes of death fro mHTN have to do with complications of what?
Atherosclerosis
Primary organs/tissues that suffer from HTN
Heart Brain Kidneys Blood vessels Eyes
Lacunar stroke
occlusion of small penetrating brain arteries resulting in multiple tiny infarcts
Water-Shed stroke
generalized arterial narrowing that causes structural requirements for higher perfusion pressure in order to maintain adequate tissue flow; a sudden drop in BP can cause a CVA
Good marker for renal dysfunction in HTN
Microalbuninuria
Essential or Secondary HTN more common?
Essential (95%)
Medications that can cause hypertension
- OCP
- Glucocorticoids
- Cyclosporine
- Erythropoietin
- Sympathomimetic drugs (for colds)
Most common cause of secondary hypertension
Renal parenchymal disease
2 common causes of renal artery stenosis
- Atherosclerotic lesions
- Fibromuscular lesions
When evaluating a patient for hypertension, what should you think if you observe unexplained hypokalemia?
- Renovascular hypertension
- Or hyperaldosteronism
Gold standard for diagnosing renovascular hypertension
Renal angiography
If an aorta has coarcation, where is the coarctation likely located?
Just distal to the origin of the left subclavian artery
When evaluating a patient for hypertension, what should you think if you auscultate a midsystolic murmur that’s particularly loud over the back?
Coarctation of the aorta
When evaluating a patient for hypertension, what should you think if the patient has “attacks” of severe, throbbing headaches, profuse sweating, and tachycardic palpitations?
Pheochromocytoma
When evaluating a patient for hypertension, what should you think if you observe Trousseau’s Sign?
Hyperaldosteronism
Tetanic muscle cramps of the hand distal to an inflated BP cuff
Trousseau’s sign
How do you differentiate between primary and secondary aldosteronism?
- Measure renin activity
- Low renin activity with primary
- High renin activity with secondary
Why might Cushing syndrome cause secondary HTN?
-Excessie cortisol increases blood volume and stimulates the synthesis of RAAS components
Dominant long-term controller of blood pressure
The kidneys via pressure natriuresis (PN)
What do chemoreceptors detect?
Changes in oxygen and carbon dioxide in the blood
What does the CNS respond to (in terms of blood pressure control)?
Ischemia of the vasomotor centers int he brain (the medulla oblongata)
Most powerful hormone system for regulating body volumes and BP
RAAS
Cornerstone for antihypertensive therapy
Thiazide diuretics
Number one cause of resistant hypertension
compliance
Definition of hypertensive emergency
BP > 220/120 with signs and symptoms of:
- encephalopathy
- acute MI
- stroke
- pulmonary edema
- aortic dissection
BP reduction time frame for patient in HTN emergency
1-2 hours
Most common cause of hypertensive emergency
Something to do with kidneys
Hypertensive urgency definition
BP >220/120 with minimal or no symptoms
Blood pressure reduction time frame in patient in hypertensive urgency
24 hours
Good drug for hypertensive urgency
IV Labetalol
Most common cause of orthostatic hypertension
hypovolemia secondary to diuretic use
What does the endothelial intima release when it’s injured?
Cytokines
Chemical irritants that can injure vessel endothelium
Nicotine, elevated lipids, elevated sugars in diabetcs
Formula for LDL if it’s not directly measured
LDL = total cholesterol - HDL - TG/5
Desirable total cholesterol
< 200
Borderline high total cholesterol
200 - 239
high total cholesterol
> 240
low (bad) HDL
< 40
high (good) HDL
> 60
desirable LDL levels
< 100
near or above optimal LDL levels
100-129
borderline high LDL levels
130-159
high LDL leels
160-189
Very high LDL levels
> 190
normal TG levels
< 150
Borderline high TG levels
150-199
High TG levels
200-499
Very high TG levels
> 500
LDL goal < 2 risk factors
160mg/dL
LDL goal with 2 or more risk factors
130mg/dL
LDL goal with CAD, Diabetes, or Established atherosclerosis
< 100mg/dL
LDL goal with acute coronary syndrome, multiple risk factors, metabolic syndrome, and tobacco usage
< 70 mg/dL
Although LDLs are the primary treatment goal, at what point should TG be the primary goal of treatment and why?
When TG > 500 because of pancreatitis risk
Characteristics of metabolic syndrome
- abdominal obesity
- atherogenic dyslipidemia
- elevated BP
- insulin resistance or glucose intolerance
- prothrombotic state
- proinflammatory state
- low HDL
Wast circumference defining level for metabolic syndrome
> 102cm (40in) for men
> 88 cm (35in) for women
Most common manifestation of ischemic heart disease
Angina pectoris
Most patients with chronic ischemic heart disease have what?
coronary atherosclerosis
How do we estimate perfusion pressure?
By measuring aortic diastolic pressure
Relationship of wall stress to afterload
directly proportional
Relationship of wall stress to LV radius
directly proportional
relationship of wall stress to LV thickness
inversely proportional
Evidence of ischemia on EKG
Horizontal or down-sloping ST depression
Equation for maximal predicted HR
220-age
Target HR for stress testing
85% of maximal predicted HR (220 - age)
How much ST depression is considered a positive stress test?
> 1mm
How much ST depression is considered a markedly positive stress test
> 2mm
Gold standard for evaluating the anatomy of the coronary artery tree
Contrast coronary angiography
Where does cardiac catheterization measure pressures?
LV and aorta
Screening test that you’d perform on someone with risk factors for CAD, but no symptoms
Electron beam computed tomography (EBCT)
What test is indicated when a patient has a positive stress test?
coronary angiography
What test should you perform if the patient presents as unstable or has profound symptoms?
Proceed directly with coronary angiography
Typical angina symptoms with no evidence of significant atherosclerotic coronary stenosis on angiogram
Syndrome X
Single most important coronary artery risk factor
Tobacco exposure
If you were a little RBC wanting to get to the diaphragmatic surface of the left ventricle, which coronary would you flow through?
The RCA
If you were a little RBC wanting to get to the posterior aspect of the LV, through which coronary would you travel?
The posterior descending branch of the RCA or possibly the circumflex, if it was posterolateral
If you were a little RBC wanting to get to the AV node, through which coronary would you travel?
RCA
What causes > 90% of UA and STEMIs?
Disruption of atherosclerotic plaque with subsequent platelet aggregation and intracoronary thrombus formation
Role of Antithrombin III
Irreversibly binds to thrombin, inactivating it
Role of prostacyclin
Inhibits platelet activation and aggregation; potent vasodilator
Role of NO
Inhibits platelet activation; potent vasodilator
Role of tissue plasminogen activator (tPA)
- cleaves plasminogen to form plasmin
- plasmin degrades fibrin clots
Role of thrombin
Helps to form a fibrin clot
Two hemostatic “players” that are involved in clot degradation or prevention of formation?
Antithrombin III
tPA
Primary difference between UA and NSTEMI
UA has no evidence of necrosis, while NSTEMI does
Pattern of pain associated with UA
Crescendo pattern of chest pain
What should you think if you have elevated cardiac markers without evolution of Q waves?
NSTEMI
How long can Troponin levels stay elevated?
10-14 days
How long can CK and CK-MB levels stay elevated?
3-5 days
Biochemical marker of choice in the evaluation of myonecrosis and diagnosis
Troponin
Cornerstone of therapy for UA and NSTEMI
Nitrates
How is unfractionated heparin administered?
IV
How is LMWH administered?
SQ injection
Sign of hand over the chest indicating an MI
Levine Sign
What should you think if you have elevated JVPs and the lungs sound clear?
IWMI with right-sided failure
How would you treat an IWMI with right heart failure?
Fluids
What should you think if you ahve elevated JVPs and the lungs have rales?
Left heart failure
How would you treat left heart failure (as opposed to right heart failure)?
Diuretics
How long after patient arrival with chest pain do you have to perform an EKG?
10 minutes
Where would you have ST elevation with an anteroseptal wall MI?
V1, V2, V3, and V4
Where would you have ST elevation with an anterior wall MI?
V3 and V4
EKG changes associated with a lateral wall MI
ST elevation in I, aVL, V5 and V6
Reciprocal ST depression in II, III, and aVF
EKG changes associated with an inferior wall MI
- ST elevation in II, III, and aVF
- Reciprocal ST depression in I and aVL (high lateral leads
EKG changes with a RV infarct
> 1mm ST elevation in lead V4R
EKG changes with a posterior wall MI
Large R waves in V1 and V2
ST depression in V1 and V2
Door-to-balloon time
90 minutes
door-to-needle time (fibrinolytic therapy)
30 minutes
Revascularization time limit after STEMI symptom onset
12 hours
Best drug for ischemia in HF patients
IV NTG
What type of murmur would you hear if someone developed a VSD after an MI?
pansystolic on the LSB
Uncommon form of pericarditis that occurs several weeks after an MI
Dressler Syndrome
Normal aorta diameter at the base of the heart
3cm
descending aorta diameter
2-2.5cm
AAA that’s distal to the renal arteries
Infrarenal abdominal aortic syndrome
Most useful mode of diagnosis for aortic aneurysm
Ultrasound
When would you repair an ascending aortic aneurysm?
> 5.5 cm
When would you repair a descending aortic aneurysm?
> 6.5 cm
When would you repair an AAA?
> 5.5 cm
Where are aortic dissections most common?
Ascending thoracic aorta
Type A aortic dissection
proximal to the left subclavian artery
Type B aortic dissection
distal to the left subclavian artery
In which type of aortic dissection is early surgical correction indicated?
Type A
Ankle-brachial index is useful in assessing which pathology?
PAD
What is often the origin of the embolus that causes acute aortic arterial occlusion?
cardiac
primary treatment for superficial thrombophlebitis
local heat
Virchow’s triad
- stasis
- hypercoagulability
- vascular damage
Homans Sign
calf pain produced by dorsiflexion of the foot