Comprehensive Heart Failure and Cardiac Emergency ECG and Treatment Guide

What is the primary function of the immune system?

To protect the body from pathogens that cause disease.

What type of cells are white blood cells?

Leukocytes.

Name three types of white blood cells.

Macrophages, Neutrophils, Eosinophils.

What are pathogens?

Microorganisms that can cause disease, including viruses, bacteria, fungi, protists, and parasitic worms.

What constitutes the body's first line of defense against pathogens?

Skin and mucous membranes.

Why is the first line of defense considered non-specific?

It protects against many pathogens without targeting one specific pathogen.

What is the second line of defense in the immune system?

The inflammatory response.

What role do mast cells play in the inflammatory response?

They release histamine, which causes blood vessels to dilate and become leakier.

What is the function of macrophages?

To consume pathogens.

What is the third line of defense in the immune system?

Adaptive immunity, which provides a specific response to antigens.

What is an antigen?

A substance recognized by the body as non-self, part of a pathogen.

What are the two major types of adaptive immune responses?

Cell-mediated and humoral responses.

What is the role of Cytotoxic T cells?

To destroy infected cells.

How do Cytotoxic T cells destroy infected cells?

They release perforin, which creates holes in the cell membrane, leading to cell death.

What is the primary function of B cells?

To produce antibodies.

What are antibodies?

Y-shaped proteins that bind to specific antigens to neutralize pathogens.

What is the difference between antibodies and antibiotics?

Antibodies are produced by the immune system to target pathogens, while antibiotics are substances that specifically destroy bacteria.

What class of antibody is associated with allergic reactions?

IgE.

What is the significance of memory B and T cells?

They store 'memory' of pathogens for a quicker immune response upon future exposure.

How do vaccines work in relation to memory cells?

They introduce a weakened or inactivated pathogen to stimulate an immune response without causing disease.

What is the role of Helper T cells?

To activate other white blood cells in both cell-mediated and humoral responses.

What happens when antibodies bind to an antigen?

They can deactivate the pathogen and signal macrophages to consume it.

What is the role of the complement system?

To enhance the actions of the immune system, working with both non-specific and specific responses.

What triggers the stimulation of Cytotoxic T cells?

An infected cell presenting an antigen from the pathogen on its membrane.

What is the function of memory T cells?

To activate Cytotoxic T cells for a faster response to previously encountered pathogens.

What is apoptosis?

A type of programmed cell death that can be triggered in infected cells.

What is the role of histamine in the inflammatory response?

To dilate blood vessels and increase their permeability, allowing more white blood cells to reach the site of injury.

What are the main components of the adaptive immune response?

Cytotoxic T cells and B cells.

What is the function of plasma B cells?

To produce large quantities of antibodies.

What is HIV?

Human immunodeficiency virus, which destroys CD4+ cells.

What does AIDS stand for?

Acquired immunodeficiency syndrome.

What is the relationship between HIV and AIDS?

Everyone who develops AIDS has HIV, but not everyone with HIV will develop AIDS.

What type of virus is HIV?

An RNA retrovirus.

What role do CD4+ cells play in the immune system?

They activate other immune cells, including B cells and cytotoxic T cells.

What happens to CD4+ cells over time in an HIV-infected individual?

HIV destroys CD4+ cells faster than they can be produced.

What is the CD4+ count threshold for diagnosing AIDS?

Less than 200 cells per cubic millimeter.

What are some common opportunistic infections associated with AIDS?

Tuberculosis (TB), candidiasis, and Pneumocystis pneumonia (PCP).

What is wasting syndrome in the context of AIDS?

Weight loss greater than or equal to 10% of body weight with concurrent diarrhea, weakness, or fever for more than 30 days.

What are the initial symptoms of HIV infection?

Flu-like symptoms such as fever, swollen lymph nodes, and fatigue.

What is the purpose of the LATTE method in assessing HIV patients?

To evaluate signs and symptoms during the initial infection and monitor for opportunistic infections.

What tests are commonly ordered for HIV diagnosis?

HIV tests, CD4+ levels, and viral load measurements.

What is the goal of antiretroviral therapy (ART)?

To suppress the virus, maintain CD4+ levels, and prevent opportunistic infections.

What is PrEP?

Pre-exposure prophylaxis for individuals who are HIV negative and at high risk.

What is PEP?

Post-exposure prophylaxis for individuals exposed to HIV, effective within 72 hours.

What is the significance of maintaining an undetectable viral load in HIV patients?

It essentially eliminates the risk of transmitting HIV to others.

What lifestyle changes should be encouraged for patients with HIV/AIDS?

Avoiding smoking and alcohol, exercising, and eating a well-balanced diet.

What is the importance of monitoring CD4+ levels in HIV patients?

To assess the immune system's health and the progression towards AIDS.

What are AIDS-defining illnesses?

Opportunistic infections or cancers that occur when the immune system is severely compromised.

What are some examples of AIDS-defining illnesses?

Invasive cervical cancer, mycobacterium tuberculosis, and cytomegalovirus retinitis.

What is the average onset time for AIDS after untreated HIV infection?

About 10 years.

What is the role of macrophages in the immune system?

They detect and destroy bacteria and other pathogens via phagocytosis.

What are natural killer (NK) cells?

Cells that primarily attack viral pathogens and cancer cells.

What is the significance of resistance testing in HIV treatment?

To determine if the virus has mutated and is not responsive to antiretroviral therapy.

What are common symptoms of opportunistic infections in HIV patients?

Night sweats, chronic diarrhea, persistent fever, and severe fatigue.

What is the importance of educating patients about HIV transmission?

To help them identify high-risk behaviors and reduce the risk of transmission.

What is the role of B cells in the immune response?

They produce antigen-specific immunoglobulin (Ig), also known as antibodies.

What is reverse isolation?

A practice used to protect immunocompromised patients from infections.

What key infection prevention measures should immunocompromised patients follow?

Avoid raw fruits and vegetables, eat only cooked foods, drink only bottled water, practice good hand hygiene, and avoid fresh flowers.

Why are fresh flowers not allowed in the room of an immunocompromised patient?

The water can be a breeding ground for bacteria.

What lab tests are important for monitoring HIV patients?

CD4+ count and viral load.

What does an undetectable viral load indicate for an HIV patient?

The patient is less likely to spread the infection.

What cells does HIV primarily attack?

CD4+ Helper T cells.

How does the destruction of CD4+ cells weaken the immune system?

CD4+ cells help activate other immune cells.

Name an opportunistic infection associated with advanced HIV.

Pneumocystis jirovecii pneumonia (PCP).

What symptoms may occur during the acute stage of HIV infection?

Fever, swollen lymph nodes, sore throat, fatigue, and rash.

What is anaphylaxis?

A life-threatening hypersensitivity reaction that occurs immediately after exposure to an antigen.

What are common triggers for anaphylaxis?

Medications, food (e.g., peanuts), insect stings, blood products, latex, and contrast dye.

What happens during anaphylaxis?

Mast cells release mediators causing systemic vasodilation, increased capillary permeability, bronchoconstriction, and airway edema.

What is anaphylactic shock?

A severe drop in blood pressure due to anaphylaxis, leading to inadequate organ perfusion.

What are the signs and symptoms of anaphylaxis?

Itching, hives, swollen lips/tongue, shortness of breath, wheezing, vomiting, diarrhea, and tachycardia.

Why is anaphylaxis potentially fatal?

It can cause airway obstruction, cardiovascular collapse, or both.

What immediate action should be taken during an anaphylactic reaction?

Administer epinephrine and seek emergency medical help.

What does the viral load measure in HIV patients?

The amount of HIV in the body.

What is the primary purpose of antiretroviral therapy (ART)?

To suppress the virus, maintain CD4+ levels, and prevent opportunistic infections.

What is the best candidate for PrEP?

A person who is HIV-negative and at high risk of exposure.

What is the correct statement about PEP?

It should be started within 72 hours after exposure to HIV.

What are the gastrointestinal symptoms of anaphylaxis?

Vomiting, diarrhea, and abdominal pain/cramping.

What neurological symptoms may occur during anaphylaxis?

Headache, dizziness, convulsions, decreased level of consciousness, and restlessness.

What cardiovascular symptoms are associated with anaphylaxis?

Tachycardia and hypotension/hypertension.

What skin symptoms may indicate anaphylaxis?

Itching, hives, and flushing.

What respiratory symptoms may occur during anaphylaxis?

Shortness of breath, wheezing, bronchospasm, and stridor.

What is the primary goal when managing anaphylaxis?

To support the airway, maximize ventilation, and ensure adequate circulation.

What is the first action to take if a patient receiving an infusion develops anaphylaxis?

Stop the infusion immediately.

What medication is administered to treat anaphylaxis?

Epinephrine.

What is the recommended dose of IM epinephrine for anaphylaxis?

0.01 mg/kg, with a maximum dose of 0.5 mg.

What concentration of epinephrine is used for IM administration in anaphylaxis?

1:1000 concentration.

What concentration of epinephrine is used for IV administration in severe anaphylaxis?

1:10,000 concentration.

What is the purpose of administering fluids during anaphylaxis?

To support blood pressure and flush the offending antigen from the system.

What does diphenhydramine do in the treatment of anaphylaxis?

Blocks the histamine response.

What role does Solu-Medrol play in anaphylaxis treatment?

Prevents delayed reactions and helps stabilize capillary membranes.

What are common signs and symptoms of anaphylaxis?

Hives, itching, wheezing, cough, tachycardia, hypotension.

What should be monitored closely in a patient experiencing anaphylaxis?

Respiratory status, heart rate, blood pressure, and signs of airway obstruction.

What is rheumatoid arthritis?

An autoimmune condition where the immune system attacks healthy cells inside the joints.

What are the classic symptoms of rheumatoid arthritis?

Pain, swollen and red joints that are difficult to move.

What factors may contribute to the etiology of rheumatoid arthritis?

A combination of genetics and environmental factors, including obesity and smoking.

What happens to the synovium in rheumatoid arthritis?

It becomes thick and inflamed, reducing synovial fluid and joint movement.

What cells are involved in the destruction of cartilage and bone in rheumatoid arthritis?

Fibroblast-like synoviocytes (FLS).

What is a concerning sign for impending airway obstruction during anaphylaxis?

Stridor and swelling of the tongue.

What is the purpose of positioning a patient with legs elevated during anaphylaxis?

To promote venous return.

What cardiovascular changes can occur as anaphylaxis progresses?

Decreased cardiac output and significant hypotension.