Hypertension Flashcards
What is hypertension in pregnancy
Systolic >140
And\OR
Diastolic >90
(More or equal)
What are the conditions that should be achieved during measurment of the BP?
- sitting\lat decubitus
- rested
- level of rt atrium
- the cuff should be >1.5x c of upper limb
Why are we seeing more HTN and DM in pregnancy
Women getting preg at older age
What are the types of hypertensive disorders in pregnancy
- preeclampsia\eclampsia
- chronic HTN
- chronic HTN + superimposed pre-eclampsia
- gestational HTN
How to diagnose pre-eclampsia
1- HTN + proteinurea (after 20wks)
2- HTN + organ dysfunction (after 20 wks)
What is considered proteinurea in pre-eclampsia
1- > or equal to 0.3g of protein in 24 urine collection
2- > or equal to 30mg\dl (+1) protein\creatinine ratio
What is pre-eclampsia with severe features
1- severe HTN: BP (S>160-D>110)
2- organ damage (renal, cerebral, visual, pulmonary, liver)
3- thrombocytopenia
What are the end organ damage present in pre-eclamspia with severe features
1- renal insufficiency
2- elevated liver enzyme\ epigastric & RUQ pain\ thrombocytopenia q
3- cerebral\visual disturbance
What is the renal insufficiency defined as:
- Cr>1.1
- doubling of baseline
When is liver enzyme considerd elevated
AST or ALT 2x normal levels
What are the clinical presentation that may increase your suspicion of pre-eclampsia?
SOB, Headache, blurred vision, right upper quadrant pain
What is HELLP syndrome
Hemolysis, elvated liver, low platelet
+ pre-eclampsia
How to differentiate thrombocytopenia in pre-eclampsia?
Very rapid decrease in platelet count
what is the state of BP in HELLP syndrome?
Either absent HTN, very severe or mild
Define eclampsia
new onset Grand-mal seizure in women w\pre-eclampsia (not due to other causes)
How to treat eclampsia
Magnesium sulfate
When does these seizure occur in eclampsia
Either before labor, during labor, after delivery (24-48hrs)
How to prevent eclampsia
Timely recognition and delivery of women with severe pre-eclampsia
How to identify chronic hypertension with superimposed pre-eclampsia?
patient is already known for chronic HTN
- patient develops new onset proteinurea after 20th weeks of gestation
- patient already has proteinurea, develop sudden increase in proteinurea or BP or new symptoms
Give an example of HTN w\superimposed pre-eclampsia
Patient w\nephrotic syndrome that worsens the HTN
What is gestational hypertension
HTN w\out proteinurea or organ dysfunction
- after 20wks
- within 48 to 72 hours of delivery & resolves by 12 weeks post-partum
What are the risk factors for pre-eclampsia
1- primaparity 2- first degree relative with hx or pre-eclampsia 3- prev pre-eclampsia 4- chronic HTN, obesity, cKD, DM, SLE 5- maternal age >40 6- multiple gestations
What is the pathophysiology of pre-eclampsia
1- lack of decidulization of myometrium
2- glomorulaar capillary endotheliosis
3- ischemia, hemorrhage, necrosis (liver, eye, brain); due to arteriolar constriction
(Incerased vascular resistance)
What is the end result of lack dicidulization, endothliosis.
Placental infarction
Having family hx or pre-eclampsia increase risk by
3x
After placental ischemia, what will increase?
Circulating SFLT1 % SEng
All the problem s of visual disterbuance, headache, cerebral edema and seizures in pre-eclampsia are caused by
Oxidative stress > presistant hypoxia = placental ischemia.
What are the important questions to ask before managing pre-eclampsia
1- severe features?
2- fetal compromise?
3- fetal maturation
What to do if the mother has severe features of pre-eclampsia
Deliver her immidiately
Name examples of fetal compromise that affect the management of pre-eclampsia
IUGR, oligohydarminos, heart rate abnormalities
If the baby was 36- or 37 and the mother develops pre-eclampsia, what to do?
Deliver her
What is the definitive treatment of pre-eclampsia
Delivery
What are the investigations you’d like to order in pre-eclampsia?
1- CBC, platelet, LDH (D-dimer, coagulation, smear)
2- renal (Bun, creatinine, uric acid, urinalysis, 24hr urine for protein & creatinine)
3- liver (AST, ALT, bili)
What is the inrtapartum management of pre-eclampsia
- magnesium sulfate (prevent seizure)
- control BP (labetalo, hydralzine, nifedipine)
- fetal monitoring
- fluid restriction
What is the toxicity of mgSO4
Loss of patellar reflex, warmth, somnolence, slurred speech, paralysis of resp»_space; cardiac arrest
What are the side effects of hydralzine
Headache, tachycardia, flushing, vomiting
Vasodilator
What is the drug of choice for short term control of pre-eclampsia HTN
Hydralzine
What is the mechanism of action of labetalol or hydrochloride
- b-blocker
- a- blocker
What are the current AHT medications for pre-eclampsia?
Labetalol and hydrochloride
avoid in HF and asthma
What are the complications of pre-eclampsia?
- recurrance
- long term CVD and chronic HTN
How to avoid recurrance of pre-eclampsia after first time?
By low dose asprin
What are the complications of pre-eclampsia on fetus
IUGR, prematurity, acute\chronic fetal distress