Final: 22 APR HTN and PH/PAH Flashcards

(99 cards)

1
Q

What is the definition of hypertension?

A

Sustained blood pressure greater than 130 systolic and/or greater than 80 diastolic

Hypertension affects about 100 million people in the United States, nearly half of adults.

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2
Q

What are the ethnic prevalence rates of hypertension in the adult population?

A
  • 40% of African Americans
  • 30% of Whites
  • 29% of Asians
  • 27% of Hispanics

The longer you live, the more likely you are to develop hypertension.

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3
Q

What is the lifetime risk of developing hypertension?

A

90%

This indicates that most individuals will experience some level of hypertension in their lifetime.

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4
Q

What are the classifications of blood pressure according to the guidelines?

A
  • Normal: below 120/80
  • Elevated: 120-129 systolic and <80 diastolic
  • Stage One Hypertension: 130-139 systolic and 80-89 diastolic
  • Stage Two Hypertension: >140 systolic or >90 diastolic

These classifications help in diagnosing and managing hypertension.

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5
Q

What are some complications of chronic hypertension?

A
  • Ischemic heart disease
  • Stroke
  • Renal failure
  • Retinopathy
  • Peripheral vascular disease
  • Increased mortality

Chronic hypertension affects all organ systems.

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6
Q

What is isolated systolic hypertension?

A

Systolic pressure above 130 with diastolic pressure below 80

This condition is common in older adults.

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7
Q

What is the primary cause of hypertension?

A

Unclear and multifactorial

Contributing factors include systemic nervous system hyperactivity and genetic predisposition.

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8
Q

What are common causes of secondary hypertension?

A
  • Hyperaldosteronism
  • Obstructive sleep apnea
  • Cushing’s disease
  • Pheochromocytoma

Secondary hypertension is more rare but potentially correctable.

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9
Q

What lifestyle factors can contribute to hypertension?

A
  • Obesity
  • Chronic alcoholism
  • Tobacco use

These factors decrease the compliance of blood vessels.

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10
Q

What is resistant hypertension?

A

Above blood pressure goal despite being on over three antihypertensive drugs at maximum doses

This indicates a challenging clinical scenario for management.

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11
Q

What are non-pharmacological interventions for hypertension?

A
  • Weight loss
  • Reducing alcohol intake
  • Exercise
  • Stopping smoking

These lifestyle modifications can significantly impact blood pressure control.

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12
Q

What is pseudo resistant hypertension?

A

Falsely elevated blood pressure due to inaccurate readings or non-compliance

This condition mimics resistant hypertension but is not due to true treatment failure.

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13
Q

What dietary factors are inversely related to hypertension?

A
  • Adequate potassium intake
  • Adequate calcium intake
  • Salt restriction

These dietary adjustments can help in managing blood pressure.

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14
Q

What is the recommended therapeutic goal for blood pressure treatment?

A

Systolic under 130 and diastolic under 80

This goal is crucial for reducing cardiovascular risk.

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15
Q

Which medications are recommended for non-black hypertensive patients?

A
  • ACE inhibitors
  • ARBs
  • Calcium channel blockers
  • Diuretics

These medications are effective in managing hypertension in this demographic.

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16
Q

What is the role of beta-blockers in hypertension treatment?

A

Reserved for patients with coronary artery disease or arrhythmias

Beta-blockers are not typically first-line therapy for hypertension.

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17
Q

What factors increase the risk of hypertension in patients taking certain medications?

A
  • Ketoconazole
  • NSAIDs
  • Chemotherapy drugs
  • Herbal drugs
  • Immunosuppressive agents

Awareness of these medications is important for managing blood pressure.

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18
Q

What is the impact of weight loss on blood pressure?

A

A decrease in one kilogram of body weight reduces blood pressure by about one millimeter of mercury

This demonstrates the effectiveness of weight management in hypertension control.

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19
Q

What is the significance of a widened pulse pressure?

A

Increased risk factor for cardiac morbidity

It correlates with vascular remodeling and stiffness.

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20
Q

What is the effect of chronic hypertension on vascular health?

A

Leads to endothelial dysfunction and increased vascular stiffness

This can result in various cardiovascular diseases.

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21
Q

What is the role of lifestyle modifications in hypertension management?

A

Important components to complement pharmacological treatment

Addressing lifestyle factors can enhance the efficacy of medications.

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22
Q

What type of therapy is supported for chronic kidney disease to manage hypertension?

A

ACE inhibitors or ARBs

These medications reduce proteinuria and slow the decline in glomerular filtration rate.

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23
Q

What are important components of comprehensive blood pressure management?

A

Non-pharmacological interventions

These interventions include lifestyle changes such as diet and exercise.

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24
Q

When are beta blockers generally reserved in hypertensive treatment?

A

For patients with coronary artery disease or TAFE dysrhythmias

They may also be used as part of a multi-drug regimen for resistant hypertension.

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25
Name two newer drug classes used in hypertension management.
* Mineral corticoid receptor antagonists * Aldosterone synthase inhibitors
26
What is carotid body ablation used for?
To help reduce high blood pressure
27
What is the recommended treatment for secondary hypertension caused by pheochromocytoma?
Surgical correction ## Footnote Removal of the tumor can correct the underlying problem long-term.
28
Which medications are not recommended for patients with bilateral renal artery stenosis?
ACE inhibitors and ARBs ## Footnote These can accelerate renal failure in such patients.
29
How can primary aldosteronism be treated?
With an aldosterone antagonist, such as spironolactone
30
What complicates blood pressure assessment in preoperative patients?
Pain and anxiety
31
What should patients be instructed regarding their blood pressure medications before surgery?
To pause certain medications the morning of surgery
32
What is necessary for a diagnosis of hypertension according to current guidelines?
Multiple elevated blood pressure readings over time
33
What is the significance of checking the contralateral arm in a patient with elevated blood pressure?
To determine if the elevation is consistent or influenced by other factors
34
What are the consequences of stopping beta blockers or clonidine suddenly?
Rebound hypertension
35
What is a hypertensive crisis categorized by?
Urgent or emergent based on organ damage threat
36
What is the first line drug of choice for pregnant patients with hypertensive crisis?
Labetalol
37
What is sodium nitroprusside used for?
As an infusion for rapid arterial dilation in hypertensive emergencies
38
What should be monitored during induction in hypertensive patients?
Blood pressure
39
What is the risk of using sodium nitroprusside?
Cyanide toxicity
40
What should be considered when treating hypertensive patients with anesthesia?
They are hemodynamically vulnerable to induction medications
41
What can transient high blood pressure indicate before surgery?
An underlying problem that may need further investigation
42
What are some symptoms indicative of pheochromocytoma?
* Flushing * Sweating * Palpitations
43
What factors contribute to left ventricular hypertrophy?
* Hemodynamic load * Preload * Genetic factors
44
What are risks associated with left ventricular hypertrophy?
* Reduced coronary reserve * Impaired contractility * Increased risk of dysrhythmias
45
What is a useful approach to minimize hemodynamic instability during induction?
Modest volume loading
46
What is the effect of antihypertensive medications on perioperative hypertension?
Increases the risk of blood loss and myocardial ischemia
47
What should be done if a patient has unexplained high spikes in blood pressure?
Investigate for underlying problems before proceeding with surgery
48
What is the treatment for hypertensive emergencies in patients with encephalopathy?
* Clonidine * Nitroprusside * Labetalol
49
What is the effect of chronic hypertension on organ damage?
Decreased resilience to hypotension
50
What can result from lower blood pressure due to altered Potter regulation in certain populations?
Cerebral ischemia ## Footnote This condition necessitates monitoring with an A line for accurate blood pressure management.
51
What is a risk associated with sodium nitroprusside?
Cyanide toxicity ## Footnote Sodium nitroprusside can also increase the risk of elevated intracranial pressure.
52
What is the effect of lower blood pressures in patients with intracerebral hemorrhage?
Lessen the bleeding ## Footnote Elevated blood pressure in these patients can often resolve spontaneously.
53
What are the primary agents of choice for aortic dissection?
* Clonidine * Nicardipine * Esmolol * Labetalol ## Footnote These agents require careful monitoring to avoid organ ischemia.
54
What is the number one drug of choice for preeclampsia and eclampsia?
Labetalol ## Footnote Nicardipine is also a good option for IV drip administration.
55
What is the definitive therapy for preeclampsia?
Delivery ## Footnote This is the only long-term solution to manage blood pressure.
56
Fill in the blank: ACE inhibitors and ARBs are ______ during pregnancy.
teratogenic
57
What are the primary agents for pheochromocytoma?
* Phenoxybenzamine * Phentolamine * Propranolol ## Footnote An alpha blocker is necessary before administering a beta blocker to avoid worsening hypertension.
58
How many types of pulmonary hypertension are classified by the World Health Organization?
Five types ## Footnote Each type is distinguished by its underlying causes and mechanisms.
59
What defines pulmonary hypertension?
Mean pulmonary artery pressure greater than 20 mmHg ## Footnote Symptoms can include an S2 or S4 gallop heart sound and lower extremity swelling.
60
What are the three hemodynamic profiles of pulmonary hypertension?
* Isolated pre-capillary pulmonary hypertension * Isolated post-capillary pulmonary hypertension * Combined pre and post-capillary pulmonary hypertension
61
What is the wedge pressure in isolated pre-capillary pulmonary hypertension?
Normal wedge pressure less than 15 mmHg ## Footnote This condition is characterized by elevated pulmonary vascular resistance.
62
What is the wedge pressure in isolated post-capillary pulmonary hypertension?
Elevated wedge pressure greater than 15 mmHg ## Footnote This condition typically arises from left-sided heart disease.
63
What is the formula for calculating pulmonary vascular resistance?
(Mean PA pressure - Wedge pressure) / Cardiac output ## Footnote This calculation helps assess the severity of pulmonary hypertension.
64
What is the sensitivity of echocardiograms in diagnosing pulmonary hypertension?
Approximately 50% ## Footnote While useful for screening, definitive diagnosis requires right heart catheterization.
65
What is the most sensitive and specific diagnostic tool for pulmonary arterial hypertension?
Right heart catheterization ## Footnote This procedure classifies the degree of pulmonary hypertension.
66
What is the mean pulmonary artery pressure range for mild pulmonary hypertension?
20 to 30 mmHg
67
What genetic mutation is associated with idiopathic pulmonary arterial hypertension?
Bone morphogenic protein receptor type two mutation ## Footnote This accounts for about 3% of cases.
68
What percentage of pulmonary arterial hypertension patients show long-term improvement with calcium channel blockers?
About one in eight patients ## Footnote Despite some treatment advancements, the one-year mortality rate remains around 15%.
69
What are the three main classes of pulmonary vasodilators used to treat pulmonary arterial hypertension?
* Prostanoids * Endothelin receptor antagonists * Nitric oxide pathway enhancers
70
What is the significance of tricuspid regurgitation velocity in assessing pulmonary hypertension?
Helps categorize the risk of pulmonary hypertension ## Footnote A TR jet greater than 2.8 indicates intermediate risk, while greater than 3.4 indicates high risk.
71
What is considered severe pulmonary hypertension based on mean PA pressure?
Greater than 40 mmHg
72
What is capillary pulmonary hypertension defined as?
Mean pulmonary artery pressure greater than 20, pulmonary capillary wedge pressure equal to or less than 15, and pulmonary vascular resistance greater than three.
73
How does post-capillary pulmonary hypertension differ from capillary pulmonary hypertension?
Elevated mean pulmonary artery pressure greater than 20, pulmonary capillary wedge pressure greater than 50, and pulmonary vascular resistance less than three.
74
What is combined etiology pulmonary hypertension?
Defined as pre and post-capillary pulmonary hypertension, with mean pulmonary artery pressure greater than 20, elevated pulmonary capillary wedge pressure, and pulmonary vascular resistance greater than three.
75
What are prostanoids used for in pulmonary vascular dilation?
They mimic the effect of prostacyclin to produce vasodilation while inhibiting platelet aggregation.
76
List the four drugs that are classified as prostanoids.
* Aprepitant (IV prostanoid) * Iloprost (inhaled version) * Treprostinil (multiple routes) * Beraprost
77
Which prostanoid has been proven to effectively reduce mortality in pulmonary hypertension patients?
Aprepitant.
78
What is the role of endothelial receptor antagonists in pulmonary arterial hypertension?
They counteract endothelial dysfunction to enhance the vasodilating effects of nitric oxide.
79
What does nitric oxide do in pulmonary vasodilation?
It stimulates guanylate cyclase and cyclic GMP in smooth muscle cells.
80
True or False: The effect of nitric oxide is long-lasting.
False.
81
What can be used to prolong the half-life of nitric oxide?
Chronic therapy with a phosphodiesterase type five inhibitor.
82
What preoperative considerations should be taken for patients with pulmonary arterial hypertension?
* Potential for venous embolism * Elevation in venous or airway pressures * Hypoxic pulmonary vasoconstriction * Reduction in pulmonary vascular volumes * Systemic inflammation
83
What are some non-specific symptoms of pulmonary arterial hypertension?
* Fatigue * Dyspnea * Cough
84
What severe symptoms can occur with pulmonary arterial hypertension?
* Angina * Syncope
85
What should a history of pulmonary hypertension prompt in patient evaluation?
Further evaluation of the patient's functional status, cardiac performance, and pulmonary function testing.
86
What is recommended prior to moderate to high-risk surgeries in patients with moderate to severe pulmonary hypertension?
Right heart catheterization.
87
What is the purpose of inhaled nitric oxide during right heart catheterization?
To determine the patient's response to vasodilator therapy.
88
What percentage of pulmonary arterial hypertension patients respond to inhaled nitric oxide?
85 to 90% do not respond.
89
What is a treatment algorithm for pulmonary arterial hypertension if a patient does not respond to calcium channel blockers?
They need pulmonary vasodilators and may require combination therapy.
90
What factors increase the risk of morbidity and mortality in non-cardiac patients with pulmonary arterial hypertension?
* History of pulmonary embolism * Coronary artery disease * Chronic renal disease * Higher ASA class * Right atrial dilation
91
What intraoperative considerations should be maintained for patients with pulmonary arterial hypertension?
Optimal mechanical coupling between the right ventricle and pulmonary circulation.
92
What is the hallmark of pulmonary arterial hypertension?
Increased right ventricular afterload leading to right ventricular dilation and hypertrophy.
93
What can transient hypotension lead to in pulmonary arterial hypertension patients?
Myocardial ischemia.
94
What is the relationship between right ventricular pressure and coronary perfusion in pulmonary arterial hypertension?
Increased right ventricular pressure leads to increased coronary flow during diastole.
95
What are the three features of lung collapse relevant in pulmonary arterial hypertension patients during thoracic surgeries?
* Non-ventilated lung * Atelectasis of the operative lung * Potential for systemic hypoxia
96
What is the goal for systolic blood pressure in hypertensive patients?
Below 130 chronically.
97
What is required for the diagnosis and treatment plan for pulmonary arterial hypertension?
Right heart catheterization.
98
What is the prognosis for patients with pulmonary arterial hypertension despite improved quality of life and survival rates?
The prognosis remains poor.
99
What is needed to maintain treatment for pulmonary arterial hypertension during the perioperative period?
Conversion from oral to inhaled pulmonary vasodilators.