Cardiac Flashcards
BP formula
BP= HR x SV x PR (peripheral resistance)
* Increase in any part of the formula, BP rises. Decrease in any part of the formula BP falls
Cardiac output
Amount of blood the heart pumps through the circulatory system in 1 minute.
BP goal for pts >60
BP goal for pts
HTN treatment for pts for non-black pts
Thiazide-type diuretic or ACEI or ARB or CCB, alone or in combination
HTN treatment for black pts
Thiazide-type diuretics, or CCB, alone or in combination.
HTN treatment for CKD pts with or without DM
ACEI or ARB, alone or in combination
Thiazides
HCTZ, chlorthalidone
*monitor Na+, K+, Mg+ depletion.
Less effective with advanced renal impairment.
Contraindicated with GOUT due to increases in Uric acid
ACEI
“Prils” Lisinopril, enalapril
*pregnancy category D
Modest hyperkalemia risk , ACEI related cough
ARBS
“Sartans” losartan, telmisartan
Pregnancy category D
CCB
Dihydropyridine (DPH) “Ipines”amlodipine
Non DPH- Ditalazem, verapamil
*caution with non DPH use due to CYP450 3A4 inhibition (especially with the use of select statins
Avoid use in presence of heart failure, renal or hepatic impairment
Malignant HTN
Rapidly progressive HTN
Diastolic usually >140
Can lead to encephalopathy
Dyslipidemia
A disorder of lipoprotein metabolism.
Increased total cholesterol, LDL, decreased HDL.
Excess circulating cholesterol can lead to plaque formation.
Meds that can cause secondary dyslipidemia
Beta-blockers
Thiazide diuretics
Antiretroviral drugs
Hormonal agents
Recommend 4 groups for statin therapy
Adults with clinical ASCVD
Adults with LDL-C >190mg/dl
Adults 40-75 years with DM
Adults with >7.5% estimated 10 year risk of ASCVD
LDL classifications
190 Very high
HDL classifications
60 High
Medications for dyslipidemia
- HMG-CoA reductase inhibitor (Statin)
- Bile acid resins (sequestrants)
- Niacin
Classification of triglycerides
500 Very high (diet & intensive meds)
Causes of elevated triglycerides
Overweight & obesity Physical inactivity Cigarette smoking Excess ETOH High carb diets T2DM, CKD, nephrotic syndrome Steroids, estrogens, retinols, beta blockers
Drug of choice for high triglycerides
Fibrin acid derivatives (fibrates)
Ex- Gemfibrozil (Lopid), fenofibrate (Tricor)
Other meds for high triglycerides
Niacin (ex-niacin, niaspan) decreases 20-50%
Fish oil (omega-3 fatty acid) decreases 20-30%
Mgmt For very high triglycerides
Goal is to prevent acute pancreatitis.
Treat triglycerides before LDL
Low-intensity statin therapy
LDL reduction approx.
Moderate intensity statin therapy
LDL reduction approx. 30-49%
Atorvastatin 10-20mg Rosuvastatin (Crestor) 5-10mg Simvastatin 20-40mg Pravastatin 40-80 mg Lovastatin 40mg
High intensity statin therapy
LDL reduction >50%
Atorvastatin 40-80mg
Rosuvastatin (Crestor) 20-40mg
Diagnostic tests for arrhythmias
ECG
Electrical physiology studies (EPS)
Tilt table test, autonomic testing
Transesophageal echocardiography (TEE)
Atrial fibrillation sx
Palpitations Fatigue Pre-syncope or syncope Dizziness Generalized weakness EKG shows irregular narrow complexes with absence of P waves
Mgmt of A-fib
Heart rate control
Correction of rhythm disturbances
Prevention of thromboembolic complications
*cardioversion if ventricular rate 120-200
Anticoagulant therapy (monitor INR)
Conversion meds- amiodarone, disopyramide & ibutilide
Peripheral vascular disease
Manifests as insufficient tissue perfusion caused by existing atherosclerosis that may be acutely compounded by either emboli or thrombi.
Physical findings of PVD
Diminished or absent pedal pulses, presence of femoral artery bruit, abnormal skin color, & cool skin temperature.
Treatment of PVD
- Antiplatelet therapy- ASA/Plavix/Pletal- reduces the risk of serious vascular events
- Aggressive treatment of hyperchlosterolemia, diabetes, HTN
Acute rheumatic fever
Inflammatory multi-system immunologic disease occurring 10 days to 6 weeks after group A streptococcus infection.
Dx criteria for scarlet fever
Positive throat culture for strep, increased titer of antistreptococcal antibodies. Plus
Minor criteria- high ESR, or CRP, prolonged P-R interval, fever, arthralgias
Major criteria- carditis, arthritis, Sydenham chorea, subcutaneous nodules, erythema marginatum.
Patients at risk for heart failure
HTN, atherosclerotic disease, DM, obesity, metabolic syndrome.
Structural heart disease- previous MI, LV remodeling, including LVH & low EF, asymptomatic valvular disease.
Sx of left heart failure (acute)
Heart & lungs “breathe through water” excess fluid retention into lungs (alveoli), dyspnea, wheeze, rales, “S3”
*Follows AMI
Sx of right heart failure (chronic)
HTN long period of time leads to hypertrophy. Fluid backs up. Fluid shunts to the right ventricle. Leads to peripheral edema, JVD & hepato-spleenomegaly.
*most common cause of right heart failure is left heart failure.
Limitations with heart failure (by stages)
Stage I- no limitations
Stage II- slight limitation, comfortable at rest.
Stage III- marked limitations, still ok at rest.
Stage IV- severe, always symptomatic.
Management of heart failure
Non-pharm. tx- sodium restriction, rest/activity balance, weight reduction.
Pharm. tx- ACEI (standard of care), often with loop diuretic, anti coagulation if A-Fib
S1 sound
AV valves (tricuspid/mitral) CLOSED Semilunar valves OPEN
S2 heart sound
Semilunar valves (pulmonic/aortic) CLOSED AV valves OPEN
S3 heart sound
“Kentucky”
Heard with increased fluid- pregnancy, CHF
S4 heart sounds
“Tennessee”
Heard with stiff ventricular wall (MI, left ventricular hypertrophy, HTN)
Where do u hear Aortic and pulmonic sounds?
Aortic- right 2nd ICS
Pulmonic- left 2nd ICS
Where do u hear tricuspid and mitral sounds?
Tricuspid- 5th ICS sternal border
Mitral- 5th ICS mid-clavicular line
Ms. ARD
Mitral stenosis/Aortic regurg.
DIASTOLIC
Mr. ASS
Mitral regurg./aortic stenosis
SYSTOLIC
Murmur of MVP
Mitral valve prolapse=mitral regurgitation SYSTOLIC
Classic finding “mid-systolic click”
Murmur that “radiates to the neck”
Aortic stenosis
Lateral leads on EKG
I, aVL, v5, v6 LATERAL
Inferior leads on EKG
II, III, aVF INFERIOR
Anterior leads on EKG
V3, v4 ANTERIOR
Septal leads on EKG
V1, v2 SEPTAL
Microcytic hypochromic anemias
MCV
Macrocytic anemias
MCV >100
Megaloblastic anemia (B12, folate)
Non-megaloblastic anemia (ETOH abuse, hypothyroid, liver ds, myelodysplastic syndrome).
Normocytic anemias
MCV 80-100 Early IDA Bone marrow suppression/invasion by malignancy Aplastic anemia Thyroid disease
Hbg/Hct ratio
1:3
High Retic count indicates?
Low Retic count?
High- anemia due to RBC’s being destroyed (hemolytic)?
Low- bone marrow failure (drug toxicity, cirrhosis)