Acute Coronary Syndromes (Part 2) Flashcards
In the setting of stable exertional ischemic heart disease (SIHD) theres an increase in ? which upsets the ?
Increase in myocardial O2 demand which upsets the balance and causes chest pain
In the setting of ACS and atherosclerosis plaque rupture, there’s an acute drop in ?
Acute drop in myocardial O2 supply which upsets the balance and causes chest pain
ACS : Clinical Signs and Sx’s
- Substernal chest pain
-Describe some characteristics
What other signs are there?
-D,N,D,P
-Sense of?
-P,A,L
-WHat kind of heart sounds?
Dull, 15-30 mins, radiates to arms, jaw or back
Dypsnea, Nausea,Diaphoresis, palpitations
-Sense of impending doom
-Pallor
-Anxiety
-Low grade fever
-4th heart sound
-JVD and 3rd heart sound
Cardiac Biomarker Reference Ranges
- Troponin T Gen 5
- CK
- CK-MB
- Cardiac Index
- < 22 ng/mL
- 0-175 IU/L
- 0-2.8 ng/mL (female)
0-4.8 ng/mL (Male) - 0-2.5% –> [CK-MB/CK activity ]*100
General Tx measures for all STEMI and High/intermediate risk NSTE-ACS Pt’s
Admission to ?
Oxygenation if?
Continuous ___
___ control
Frequent ___
__relief
S__
Hospital
if O2 Sat <90%
multi lead ECG monitoring looking for ischemia and arrhythmias
glycemic
vital sign monitoring
pain
stool softeners
TX : STEMI ED
Beginning with chest pain lasting >= 10 mins, what is the pathway for STEMI diagnosis and treatment options?
If chest pain >= 10 mins, do 12 lead ECG within 10 mins , if ST segment elevation —> in ED give MONA (Morphine, oxygen, NTG SL +/- IV, Aspirin or clopidogrel)
—> Heparin IV, +/- Metoprolol IV
–>. Can give P2Y12 inhib, can give statin (If not in ED give later)
-Start reperfusion therapy PCI or Fibrinolysis
Early Pharmacotherapy : STEMI Morphine
-What’s the dose?
-Indicated for?
-AVOID in which patients?
-Caution because?
-Morphine has DDI with?
1-5 mg IV slow bolus every 5-30 mins PRN
-Indicated for chest pain, anxiety, pulmonary edema
-lethargy, hypotension, bradycardia
-may not be able to tell if pt has relief of chest pain or just being blunted by opioid
-clopidogrel
Early Pharmacotherapy : STEMI OXYGEN
Dose?
Indicated for O2 saturation under?
Other uses?
2-4 LPM by nasal cannula
-O2 sat < 90%
-HF
-Dyspnea
Early Pharmacotherapy : STEMI NITROGLYCERIN
-Decreases incidence of __ while using nitrates during?
-What’s the NTG sublingual dose?
-What can be used if pain not controlled? Dose of this?
-What’s an early sign of nitrate tolerance ?
-DONT USE nitroglycerin if SBP is ??? **
-Limit IV nitroglycerin to complicated pt’s with ?
Death, first 24 hrs of care
-0.4 mg every 5 min x 3 doses as BP allows
-IV nitroglycerin . 10 mcg/min IV and titration by 10mcg/min every 5 mins until free of CP or dose related side effects
-Tachyphylaxis
-SBP < 90 mmHg or < 30 mmHg below baseline
-ongoing anginal pain, LV failure, severe HTN
Early Pharma : STEMI ASPIRIN
-Its the most ___ adjunctive therapy for ACS
-ASA DECR ____ in stemi’s
-Dose?
-Cost effective
-Mortality rate
-325 mg (or 4x81 mg = 324 mg) chewed and swallowed as soon as possible
Early Pharma : STEMI HEPARIN
-Exerts direct antiplatelet effects by binding to and inhibiting ___
-Major effect is on interaction between __ and ___
-Initiated in ?
-Continued in cath lab to prevent ___
VWF
Thrombin, antithrombin-III. Inhibs thrombin induced platelet aggregation that initiates UA and venous thrombosis
ED
Immediate thrombus formation at the site of arterial injury during PCI
HEPARIN : DOSING in STEMI bolus and IV
A. If Fibrinolysis ?
B. If primary PCI?
C. If medical management only?
A. 60 units/kg IV bolus . Max 4000 units
12 units/kg/hr IV (max initial rate = 1000 units/hr)
Titration based on APTT (1st APTT at 3 hrs, subsequent q6hrs)
B. 60 units/kg IV bolus, max of 5,000 units
-12 units/kg/hr (max initial rate = 1000 units/hr)
-ACT monitoring in cath lab
C. 60 units/kg IV Bolus (max 5000 units)
-12 units/kg/hr (max initial rate = 1000 units/hr)
-APTT to monitor heparin based on nomogram
Heparin : Monitoring
-What must you monitor?
-What monitoring tests to determine level of anti coag?
-Signs of ?
-recurrent ____
-T
-CBC w/platelet count
-aPTT - outside cath lab , ACT inside cath lab
-bleeding
-ischemia
-thromboembolism
Heparin : Precaution and Side effects
-narrow ___
-Heparin induced _____
-H
-H (rare)
-Reverse anti coagulation by ?
Therapeutic window
Thrombocytopenia can occur after 5+ days of therapy
Hemorrhage
Hypersensitivity reactions (rare)
Stopping infusion +/- administration of protamine. PROTAMINE dose = 1 mg for every 100 units of circulating heparin (t1/2 is 60-120 mins)
EARLY pharmacotherapy : STEMI BETA BLOCKERS
-The benefit would be ?
-Dose?
-Avoid in ?? (5)
-Early (0-12 hrs) administration of Beta blockers within 12 hrs of onset of CP can reduce ?
-Reduction in myocardial workload (DECR HR, BP, myocardial contractility)
- Metoprolol tartrate 5 mg IV q 5 mins up to 3 doses in refractory HTN or ongoing ischemia w/o CI
1.Advanced age (70 yrs and older)
2. Bradycardic (HR < 60 bpm),
3. Hypotensive pt’s (SBP < 120 mm hg)
4. prolonged PR interval ,2nd or 3rd degree heart block
5. active asthma or reactive airway disease
- ventricular arrhythmias, recurrent ischemia, re-infarction, and mortality
If a STEMI patient who is a candidate for reperfusion arrives at a PCI-Capable hospital, what’s the time window by which they must receive primary PCI?
Door 2 Balloon time is 90 minutes
If a STEMI pt is seen at a non-PCI capable hospital, and you want to transfer them to another facility for PCI , what’s the time window by which all of this has to occur?
-If we are unable to transfer our patient within this time limit, what must be started and what is the time limit to begin this tx?
They need to be transferred and start PCI in the facility that is capable within 120 mins or less.
-Fibrinolysis or Thrombolysis must begin within 30 mins of arrival
Fibrinolysis : They increase MVO2 ___ by ___ and allowing for greater blood flow
What are some indications for Fibrinolysis ?
Supply, dissolving the thrombus
- Sx’s of ACS w/an onset within 12 hrs of first medical contact
- ST Segment elevation of at least 1 mm in height in 2 or more contiguous leads, or new or presumed new left bundle branch block
- Anticipated that primary PCI cant be performed within 120 mins of first medical contact
In which situations would we favor thrombolytics and in which situation would we favor PCI?
We favor thrombolytics in aspects of bleeding. PCI causes more major bleeding.
However, Thrombolytics cause more ICH, in this situation we favor PCI
Intracranial Hemorrhage (ICH):
remains the biggest concern with ?
-this is most likely to occur during ?
-Characteristics of pt’s with incr risk of ICH? (5)
-rank the fibrinolytics in terms of most bleeding rate?
Fibrinolytics
-most likely to occur within first 24 hrs
-females, age > 75 yrs old, known cerebral vascular disease, elevated DBP and or SBP, HTN
-Tenecteplase > Reteplase > Alteplase
Absolute CI’s for Fibrinolysis ?
- Active ___ (not including menses)
- Previous ___
- ___ within 3 months (except it happening within 4.5 hrs)
- Known ___ (primary or metastatic)
- Known _____ (arteriovenous malformation)
- Suspected ____
- Significant closed ___ or ____ within 3 months
- ___ or __ surgery within 2 months
- Severe uncontrolled ___ (unresponsive to emerg therapy)
- For streptokinase, prior streptokinase tx within previous ___
- Internal bleeding (not menses)
- Intracranial hemorrhage (ICH) at any time
- Ischemic stroke
- Malignant intracranial neoplasm
- Structural vascular lesion
- Aortic dissection
- Head, facial trauma
- Intracranial, intraspinal
- Hypertension
- 6 months
Check Fibrinolysis dosing on chart and know Tenecteplase
See Chart
Fibrinolysis : Monitor for Side Effects such as? (4)
Consider Fibrinolysis successful if? (3)
- BP
- Bleeding (Hematocrit, Hgb, hematuria, hematemesis, hemoptysis, hematochezia)
- Mental status bc of risk of ICH
- Allergic rxns
- > 50% reduction in ST Segments of the ECG
- Relief of chest pain
- Appearance of reperfusion arrhythmias
Primary PCI :
Transporting pt’s directly from ___ to ___
What should already be started?
Diagnostic angiogram completed will give u which two options?
What are the antithrombotic strategies during PCI?
ED, CATH LAB
Heparin
Continue with PCI or Defer to CABG
- Continue heparin from ED as mono therapy
- Continue heparin and add Cangrelor
- Stop heparin and start BIVALRUDIN + CANGRELOR
- Possible (rare) use of glycoprotein 2b/3a inhibitors added on to one of the above choices during PCI as a means of salvage or part of bailout strategy
PRIMARY PCI : Bivalirudin
-Initiated in __ with ___
-May be used as an alternative to __ +/- __
-It has similar outcomes but less ___
-May reduce ___ after discontinuation to a greater degree than heparin
-Mechanism?
-PRIMARY PCI DOSING?
-Monitoring test?
-When should you discontinue ? If you continue it, whats the dose and how long?
-Caution : reduce dose with ?
Cath lab with PCI
- heparin +/- Glycoprotein 2b/3a inhibitors
-bleeding
-thrombin deactivation
-direct thrombin inhibitor
-LD is 0.75 mg/kg IV bolus , MD 1.75 mg/kg/hr
-ACT
- At the end of PCI or may continue with 1.75 mg/kg/hr x 4 hrs and then 0.2 mg/kg/hr (up to 20 hrs post PCI)
-Significant renal disease
Primary PCI ED or Cath Lab : ADP receptor blockers
- What are the drug classes?
- MOA?
- Prevents transformation of ?
- Leads to less ?
- Thienopyridines / P2Y12 inhibitors (Clopidogrel, prasugrel, ticlodipine ) (Clopidogrel, prasugrel, ticagrelor, cangrelor) ticagrelor and cangrelor are reversible
- Irreversibly inhibit the binding of ADP to its platelet receptor
- Glycoprotein 2b/3a receptor into its active form
- Leads to less platelet aggregation
Kim Check Chart for P2Y12 inhibitors
See Chart