Cardiac pathologies

Heartachokes!

Cardiac patho

• CAD- CORONARY ARTERY DISEASE• Coronary arteries supply O2 blood to the

myocardium-heart muscle.• Coronary arteries can easily become clogged

and a blood clot forms.• This is called coronary thrombosis- narrowing

of the lumen of the artery- lumen is the opening in a tube

CAD

• If the lumen is narrowed because of fat deposits it is called plaque

• This is called atherosclerosis• If the blockage is big enough it can block the

whole artery and cause ischemia- this is a deficiency of blood and O2 to the heart muscle which causes a heart attack!

CAD

• CAD is the leading cause of death in the US! if a lumen slowly narrows, some of the heart

cells die and are replaced by scar tissue. Dead muscle tissue is called an infarct.

This is a true heart attack or myocardial infarction.

CAD

• Signs and symptoms of a heart attack may be:• “feels like an elephant sitting on my chest.”• “feels like someone squeezing my chest.”• Referred pain to the neck or the left arm• Clammy, tired, nausea,sweating

CAD

• What should I do if someone is having a myocardial infarction?

• If conscious- give aspirin, if they have a script of nitroglycerin(causes vasodilation), put it under their tongue- you can give up to 3 every 5 minutes

• Call 911• If not conscious start CPR

CAD

• Why do people have CAD?• Obesity• Smoking• High blood pressure• Diet high in fat and salt- high in cholesterol• Sedentary• *One or more of these factors may put a

person at risk*

CAD

• How is this treated?• Thrombolytic drugs- clot busters like:• TPA (tissue plasminogen activator) and

streptokinase busts a clot once it has happened. hospital wants thrombolytics within 3 hours.

• Anticoagulants- aspirin thins the blood to keep one from forming

CAD

• Oxygen and pain relievers- O2 to help get oxygen to the dying portions of the heart

and pain meds to reduce stress on the heart and use less O2.

Surgery- coronary artery bypass graft (CABG)They take a vein from somewhere in the body-

like the saphenous from the leg, or mammary vein from the chest and bypass the artery with the clot.

CAD

• Angina pectoris- this is temporary O2 insufficiency. They may have severe pain in the chest. This is not a heart attack, but can feel like one. These usually follow a big meal, trying to exercise, exposure to cold or stress.

• Again nitroglycerin under the tongue can help with pain because it dilates the arteries to let blood through more easily

Hypertensive heart disease

• People who have had high blood pressure for a long time overwork the heart because it has to pump against resistance- like putting your finger over the hose.

• The heart enlarges and the left ventricle has to do most of the work to meet the demands of the body.

• Finally the ventricle becomes exhausted and is unable to pump and fails. Heart failure.

CAD

• Cor pulmonale- right side heart failure from chronic lung disease. The lung blood vessels are diseased and impairs the blood flow to the lungs. This works the right side ventricle and it becomes enlarged and eventually fails. right ventricle pumps to lungs.

CAD

• Congestive heart failure- CHF• Means the heart is pumping inadequately to

meet the needs of the body. This allows fluid buildup in lungs and extremities.

• It can be right or left sided each have different signs and symptoms

CHF

• Right side failure looks like:• Edema in the ankles, distention of neck veins,

enlarged liver and spleen.• Left side looks like:• Shortness of breath due to fluid build up in

the lungs- pulmonary edema, wheezing

Congenital heart disease• The foramen ovale is a small opening that babies

have before they are born and it is located in the septum, or the middle wall that divides the right and left side of the heart.

• Before the baby is breathing on it’s own, this little hole allows the blood from the right side of the heart to go directly to the left side without having to go to the lungs.

• If it does not close after the baby is born, it can cause some heart failure because the heart is pumping too hard to get the blood into the aorta.

Congenital defect• Tetralogy of fallot- very serious defect- means

there are 4 abnormalities. These babies are blue, born cyanotic.

Congenital heart disease

• Tetrology of fallot- signs and symptoms• Child will be blue• Clubbed fingers and nails• Short of breath with any exertion- even crying• Child will squat after exercise for relief from

breathlessness

Congenital defects

• What can they do for tetrology of fallot?• Surgery on the narrow opening of blood flow

to the lungs.• Sometimes these children do not live long

Valve diseases

• There are 2 ways valves can fail:• 1st: valve may be too small for blood flow

called stenosis• 2nd: valve can be too large and floppy and

allows the back-flow of blood into the atria called valvular insufficiency.

• Heart murmur is the sound that indicates the defect- whoosh whoosh sound not lub dub

Valve disease

• Mitral stenosis- valve is too small and cusps form on the valve flaps that are normally flexible. Now they become rigid and fuse together and it takes much pressure to get the blood forced through the narrow opening.

• Sometimes a clot can form because the blood pools for too long and can travel to the brain vessels of the brain ect.

Mitral stenosis

• Signs and symptoms: neck veins distended• Cyanosis• Edema in ankles• Wet cough• More common in women than men

Aortic stenosis

• The valve stenosis that leads to the aorta, happens more in men than women.

• Again the cusps become rigid and fuse together look like warts on the valve because calcified material are deposited on the valve. The left ventricle has to work too hard to pump the blood to the body

Aortic stenosis

• Signs and symptoms can be:• Fainting• Chest pain• Short of breath• cyanosis

Rheumatic heart disease

• Heart disease that occurs from a strep infection.

• When a person has an infection with hemolytic strep, they have sore throat, or ear infection, inflamed and painful joints, and sometimes a rash.

• Usually this is an infection of children or young adults

Rheumatic heart disease

• A few weeks after the infection, the body develops a reaction between the strep antigen and the body’s own antibodies against them. This makes scarring on the mitral valve and sometimes the semilunar valve.

• Rheumatic heart disease can be the underlying cause for valve disease.

Heart infections

• Infectious endocarditis- the endocardium is the inner lining of the chambers of the heart and covers the valves. Endocarditis is an inflammation of this lining caused by a strain of strep. Organisms enter the blood stream from an infected tooth, UTI, skin infection ect.

• If the person already has rheumatic fever lesion on the heart, the infection will spread to the heart.

endocarditis

• Signs and symptoms:• Fever• Chills• Pain• Joint pain• Swelling in ankles• New heart murmur sounds like whoosh-

whoosh to even scrapping

endocarditis

• Treatment- antibiotics, surgery on the valves if it is necessary.

anemia

• Anemia is an inadequate number of red blood cells, hemoglobin or both.

• There are different kinds of anemia from different sources:

• Chronic blood loss anemia- too few RBCs needs a transfusion- caused by slow bleeding or inability to clot

anemia

• Iron deficiency anemia- not enough iron to form hemoglobin. Diet is poor in green leafy veggies, and may need an iron supplement

• Aplastic anemia- injury or destruction of red bone marrow. This leads to poor formation of red blood cells. Usually caused by chemotherapy, radiation, or viruses.- this is frequently fatal

anemia• Pernicious anemia- abnormally large erythrocytes(RBCs) and not enough of them.Patients do not absorb vitamin b12 in the digestion tract, and need b12 injectionsSigns and symptom of anemia:FatigueChest painPaleWeakness short of breathBrittle nailsIrregular heartbeatRestless leg syndromeIncreased susceptibility to infections

• Sickle cell anemia- chronic inherited anemia. RBC are abnormally shaped. They look like crescents and carry less O2. the sometimes break easily, and cause clots

anemia

• Signs and symptoms of sickle cell:• In babies you might see swollen hands and

feet• In a “crisis” the sickle cells can clog vessels in

joints chest, legs, and cause moderate to severe pain.

• Some people only have a few crisis’ ever, and some people can have dozens per year.