Manifestation due to compensation

▪ Tachycardia

▪ Pallor

▪ Oliguria (minimal urinary output)

– From decreased renal perfusion

– Renal failure is common and may require dialysis

▪ Left and/or right-sided CHF

Left sided CHF Manifestations

▪ Pulmonary congestion

▪ Dyspnea

▪ Orthopnea

▪ Paroxysmal nocturnal dyspnea (PND)

▪ Cough

– May be accompanied with hemoptysis (coughing blood)

▪ Wheezes and rales audible on auscultation

▪ Pleural effusion

▪ Acute left sided failure will manifest with pulmonary edema

– Related to rapid accumulation of fluid and increased ventricular pressures

Right sided CHF Manifestations

▪ Systemic congestion

▪ Dependent edema

▪ Digestive disturbances

▪ Hepatomegaly / Splenomegaly

▪ Distended jugular veins

▪ Ascites (can get hernia)

Vascular disorders

Arterial disorders:

▪ Hypertension

▪ Aneurysm

▪ Peripheral vascular disease

Venous disorders:

▪ Thromboembolism (mainly DVT and PE)

▪ Varicose veins

Hypertension

▪ Consistent elevation of systemic arterial blood pressure

– Generally, BP >140/90 is considered mild hypertension for the average person

– For people with DM, BP > 130/80

– For those older than 80 years, BP >150/90

o Due to the stiffening of blood vessels that occurs naturally with aging

▪ Isolated systolic hypertension (ISH) is consistently

elevated SBP >140mmHg with diastolic (DBP) remaining within normal range (<90mmHg)

– ISH is rising within every age group and is strongly associated with increased risk of cardiovascular and cerebrovascular events

Types of Hypertension

Primary hypertension (90%)

▪ Also called essential or idiopathic

▪ Most common type

– Gradual onset

– Most likely related to combination of aging and modifiable environmental and lifestyle factors

Secondary hypertension (10%)

▪ Develops in response to other disease processes including:

– Renal disorders

o E.g. Glomerulonephritis, pyelonephritis, polycystic kidney

– Endocrine disorders

o E.g. Primary hyperaldosteronism, pheochromocytoma, Cushing’s syndrome, hyperthyroidism

– Vascular

o Renal artery stenosis

– Drug induced

o E.g. Steroids, estrogens

– Pregnancy

▪ Note that many of the conditions related to the development of HTN are chronic in nature indicating a relationship between these processes and the chronic inflammation as well as physiologic/pathologic adaptations that occurs

Risk factors:

▪ Nonmodifiable:

– Age

– Male gender

– Race

o E.g. African Americans have higher than average blood pressure

– Family history

o Genetic predisposition bis believed to be polygenic and related to defects associated with renal sodium excretion, SNS and RAAS activity, as well as cell membrane sodium and calcium transport

▪ Modifiable

– Obesity

o Related to hormones secreted in obesity and insulin resistance that may develop

– High salt intake

o Leads to increased vascular volume from decreased salt excretion by the kidneys

– Physical activity

– Stress

– Smoking

– Alcohol consumption

– Drugs

o E.g. Oral contraceptives

Pathophysiology:

▪ Sustained increase in peripheral resistance (arteriolar vasoconstriction), increase in blood volume, or both

– There is damage to the arterial wall leading to sclerosis (hardening and thickening) and narrowing of the arteries

– Weakening of the arterial wall can lead to an aneurysm

o Aneurysms are often asymptomatic and may go undetected

o Continued growth may lead to rupture and hemorrhage

– Decreased perfusion leads to organ ischemia and subsequent end-organ complications

Clinical manifestations:

▪ Termed the silent killer as it is usually asymptomatic

– Diagnosis based on regular BP measurement

o Some may have physiologic/anatomic damage despite normal BP measurements

• If these changes remain undetected and untreated they may become established early in adulthood and begin accelerating in progression leading to increased risk for complications starting in middle decades of life

– Potential symptoms include:

o Morning occipital headache

o Manifestations of end organ failure

▪ Clinical manifestations are usually related to tissue and/or organ damage outside of the vascular system and are therefore dependent on the system affected

▪ These clinical manifestations include:

– Cardiovascular

o Liver hypertrophy

o Heart failure

o CAD

o PAD

– Cerebrovascular

o TIA

o Cerebral stroke

o Encephalopathy

– Visual System

o Retinopathy

o Papilledema

o Loss of vision

– Renal System

o Renovascular disease

o Renal failure

Resistant and Malignant Hypertension

▪ Resistant HTN:

– Persistently elevated BP despite medical treatment

– Common risk factors: old age, obesity, renal disease

– Requires more aggressive control, often with 3 or more drugs

▪ Malignant HTN:

– Rapidly progressive hypertension with DBP usually >140mmHg

– Hypertensive emergency

– Cerebral arterioles are unable to regulate blood flow to cerebral capillary beds leading to:

o Cerebral edema and cerebral dysfunction

o Papilledema

o Cardiac failure

o Uremia

o Retinopathy

o Cerebrovascular accident (CVA; stroke)

– Severe HTN + acute target organ damage

Hypotension

▪ BP < 90/60 and symptomatic

Causes:

▪ Orthostatic hypotension

– Decreased BP upon standing

o Diagnostically, a decrease in SBP >20mmHg or decrease in DBP >10mmHg within 3 minutes of standing

– Due to lack of BP compensation in response to gravity

– Most common type of hypotension

▪ Hypovolemia

▪ Excessive vasodilation (usually peripherally)

▪ Drug induced

▪ Shock

– Hypotension is common and may require treatment with vasopressors to prevent complications from ischemia

▪ Potential secondary disorders leading to hypotension include:

– Endocrine disorders

– Metabolic disorders

– Diseases of the central or peripheral nervous system

Manifestations

Dizziness

Blurred vision or vision loss

Syncope

Venous Thromboembolism (VTE)

▪ Occlusion within venous bed by: clot (thrombus, embolus)

Pathophysiology:

▪ Virchow triad (Vascular damage, Hypercoagulability, Circulatory stasis)

– Two key states of circulatory stasis are post-operative patients (especially orthopedic surgery) and atrial fibrillation

– Hypercoagulability

o Inherited abnormalities that increase risk in the absence of other usual risk factors include ATIII deficiency, prothrombin mutations, as well as deficiencies in proteins C, S

o Increased blood viscosity caused by eg. Polycythemia rubra vera

▪ Main conditions associated with VTE:

– Deep vein thrombosis (DVT)

– Pulmonary embolism (PE)

Clinical manifestations DVT:

▪ Swelling and pain in calf

▪ Homan’s sign

– Lift the knee and dorsiflex foot elicits pain in affected extremity

Clinical manifestations of PE:

– Dyspnea, chest pain on inspiration

– Tachycardia, cyanosis, hypotension

Diagnostic Findings:

▪ Radiology

– Doppler Ultrasound for DVT

– CT and pulmonary angiography, V/Q scan for PE

▪ Laboratory Testing

– Elevated D-dimer

o Rule-out criteria

o A negative D-Dimer rules out PE, however, a positive D-Dimer does not confirm PE but instead indicates further testing

Varicose Veins

▪ Distended and tortuous (twisted and turning) veins leading to pooling of blood

Pathophysiology

▪ Valve damage caused by:

– Trauma to saphenous veins damaging one or more valves

– Gradual venous distention

o Caused by the action of gravity on blood in the legs while standing

o When a valve is damaged, a section of the vein is subject to increased pressure from a larger volume of blood leading to:

• Engorged vein

• Increased hydrostatic pressure and subsequent edema

Varicose Veins

▪ Distended and tortuous (twisted and turning) veins leading to pooling of blood

Pathophysiology

▪ Valve damage caused by:

– Trauma to saphenous veins damaging one or more valves

– Gradual venous distention

o Caused by the action of gravity on blood in the legs while standing

o When a valve is damaged, a section of the vein is subject to increased pressure from a larger volume of blood leading to:

• Engorged vein

• Increased hydrostatic pressure and subsequent edema

Risk factors:

▪ Age

▪ Female gender

▪ Family Hx

▪ Obesity

▪ Pregnancy

▪ DVT

▪ Prior leg injury

End of Module