CARDIOLOGY Flashcards
What sort of waves should you expect with SVT (supraventricular tachycardia)
-narrow complex tachycardia
-retrograde p waves that often appear w/in t wave or ST segment
What 2 grps do NOT get exercise ekg stress test
(1) Pt unable to exercise
(2) Pts with baseline ekg abnormalities
What 4 ekg abnormalities require a pt NOT get tested using exercise ekg stress test
(1)WPW
(2) ST depressions
(3) LBBB or ventricular pacing/pacemakers–both cause false-positive LV anteroseptal defects
(4) digoxin use
These pts require stress testing with pharmacologic agent instead
STEMI Management:
a) What 4 things should you immediately give pt with STEMI
b) What 1 question do you need to ask
4 THINGS:
(1) ASA loading dose (162-324 mg)
(2) P2Y12 inhibitory (clopidogrel, ticagrelor)
(3) IV anticoagulation: UFH, enoxaparin, bivalirudin
(4) oxygen prn, BB prn
1 QUESTION TO ASK:
Is pt at PCI-capable facility. IF yes, goal 1st medical contact-to-balloon time 90 mins (or can be transferred to this facility w/in 120 mins.).
IF NO, thrombolytics.
NSTEMI Management
What is management –2 main options– for NSTEMI
1) Invasive managment–>Coronary angio. Note can be immediate (w/in hrs), early (2-24hrs), or delayed (24-72hrs)
NSTEMI part of ACUTE coronary syndrome (ACS). ACS (STEMI, UA, NSTEMI) is umbrella term for presentation of ACUTE CHEST PAIN +/- ekg findings of ischemia
Ok, you’ve done ekg and no ST changes. Drawn labs and troponin is negative (meaning UA or NSTEMI). Now have 2 options
#2) Medical management (ischemia-guided therapy)
What are 4 indications for IMMEDIATE invasive therapy (coronary angio w/in 2hrs)
- (1) signs/sx of HF (JVP, LE)
-(2) hemodynamic instability
-(3) recurrent/refractory angina not responding to medical therapy
-(4) life-threatening arrhythmias (vtach, vfib)
What are indications for EARLY invasive therapy (coronary angio w/in 2-24hrs)
- new ST depression
- positive trop
- GRACE score >140
Do STEMI and NSTEMI-ACS pts selected for PCI get parenteral anticoagulation and DAPT
Yes. But remember, NSTEMI-ACS do NOT get fibrinolytics
What is therapy for ischemia-guided NSTEMI-ACS management?
Basically same as those getting invasive management except that fondaparinux ok if NO invasive tx planned
(1) ASA loading dose (162-324 mg)
(2) P2Y12 inhibitory (clopidogrel, ticagrelor)
(3) IV anticoagulation: UFH, enoxaparin, bivalirudin OR Fondaparinux
**NEXT do stress test or eval LV function **(w/echo. IF EF <40%, early angio needed)
** In the PLATO trial, ticagrelor was found to be superior to clopidogrel in reducing the incidence of cardiovascular death, myocardial infarction, and stroke after ACS, and the American College of Cardiology/American Heart Association guideline confirms that it is reasonable to use ticagrelor in preference to clopidogrel for maintenance P2Y12 inhibitor therapy. Clopidogrel or ticagrelor therapy may be used regardless of the ACS treatment strategy; however, prasugrel is indicated only in patients treated with percutaneous coronary intervention.
Aortic Stenosis. Answer 5 Questions
(1) What are RFs
(2) Describe murmur
(3) What makes louder
(4) How do you assess severity? What is dx? (5) What is tx
AORTIC STENOSIS:
(1) RFs: age-related clarification, congenital bicuspid aortic valves btwn 40-70yrs
(2) Murmur: systolic cresendo-descrendo along right upper sternal border
(3) Louder w/squatting, expiration
(4) Dx w/doppler echo. Severity assessed by:
-mean gradient ≥ 40mm Hg
-peak velocity ≥ 4m/sec
-VALVE AREA < 1cm2
(5) Treatment always SURGICAL.
Indications for tx:
–Symptomatic SEVERE OR
–asymptomatic SEVERE w/EF <50% OR
–asymptomatic SEVERE undergoing cardiac surgery
**SAVR (surgical AV replacement)»_space; TAVR (transcatheter AV replacement).
**TAVR is less invasive (becs catheter) but less durable and so preferred in pts >80yrs.
Mitral Stenosis. Answer 5 Questions
(1) What are RFs
(2) Describe murmur
(3) What makes louder
(4) How do you assess severity? What is dx? (5) What is tx
MITRAL STENOSIS
(1) Usually 2/2 rheumatic fever. Other causes include SLE and severe valve calcification. Afib common and also can cause pulmonary HTN and R-sided HF.
(2) diastolic murmur w/opening snap, low-pitched rumbling; best heard at left 5th interspace at midclavicular line
(3) Squatting, expiration
(4) cardiac echo, TTE 1st. Severe MS is defined as VALVE AREA ≤ 1.5cm2
(5) Medical management (diuresis/BB/CCB) or surgical (mitral balloon valvotomy) IF severe and symptomatic.
Surgical mitral valve repair/replacement LESS desirable
IF pregnant with MS: BB –>surgical repair
What is medical management for MS
*Medical management: diuresis + heart rate control (BB, CCB)
*IF non-pregnant with MS AND afib/thrombus/prior embolic event: warfarin.
*IF pregnant with MS and Afib/thrombus/prior embolic event: heparin instead (becs of the teratogenic effects of warfarin).
**DOACs NOT indicated in afib+MS
Mitral REGURGE. Answer 5 Questions
(1) What are RFs
(2) Describe murmur
(3) What makes louder
(4) How do you assess severity? What is dx? (5) What is tx
MITRAL REGURGE
(1) Any issue w/mitral valve–>rheumatic heart dx, endocarditis, MVP, ischemia involving papillary muscle (from CAD or MI -see this w/acute MR)
(2) Chronic MR different from acute MR. ———Chronic MR: constant holosystolic murmur
-Acute MR: descrescendo early systolic murmur at APEX (AR is descrendo diasytolic murmur @ left sternal border) + wet lungs
(3) Louder with:
-Chronic MR: increased afterload (handgrip, expiration), no change in valsalva
-Acute MR: Squatting, expiration
(4) Cardiac Echo, TTE. Chronic worse than acute
(5) Chronic: diuretics, afterload reducing agents (ACE-I/ARB)
-Secondary needed for acute AR
**IF surgery, reconstruction preferred UNLESS have Rheumatic fever–then replacement
What is treatment for prinzmetal angina? What agent should be avoided?
**With Prinzmetal agina pt p/w CP at rest, transient ST elevations, neg trop, and normal coronary arteries.
-Tx: CCB
-AVOID BB as this can increase risk of spasms.
Describe 3 general tx for afib
1) urgent/emergent cardioconvert –>hemodynamically unstable tachycardia
2) Rate control –> common for asx or minimally sx pts
3) Rhythm control –>preferred for symptomatic or younger pts
Discuss cardioconversion strategy for afib
1) DC cardioversion preferred to pharmacologic cardioversion
2) When doing cardioversion, IF afib >48hrs or duration unknown then:
-anticoagulation recommended for 3wks prior and 4wks after cardioversion (regardless of CHADS2Vasc score) OR
-Use TEE to r/o thrombus and then cardioconvert (TEE-guided cardioconversion is fast and effective)
Note if afib <48hrs, most pts can be cardioconverted safely w/out any preceding anticoagulation
Describe in detail rhythm control-pharmacologic cardioversion options for a fib
**if >48hrs, 1st TEE to r/o thrombus then pharmacologic cardio. remember electric cardioconversion is PREFERRED over pharmacological, both get TEE 1st
IF Afib >7days
-1st option: dofitilide
-2nd line: amiodarone or ibutilide
IF Afib < 7 days
-1st option: dofetilide, flecainide, ibutilide, or propefanone
-2nd line: amiodarine
Describe anticoagulation strategy for Afib
Anticoagulation to prevent thrombosis in afib pts (regardless of rhtymn or rate control strategy) recomended.
1) CHA2 DS2 VASc used for risk stratification of non-valvular afib pts.
2) Warfarin (regardless of CHAA2 DS2 VAsc) for–HCM AND prosthetic vavles
What is CHA2 DS2 VASc
This is risk stratification for pts WITH NON-VALVULAR afib (no prosthetic valves, rheumatic MS) – used to determine whether pt with afib should be on an anticoagulant.
C: CHF or EF <35% (1 pt)
H: HTN (1 pt)
A : Age ≥ 75 (2pts)
D: DM (1 pt)
S: Stroke/TIA/thrombolic event (2 pts)
V: vascular dx (prior MI, PAD, aortic plaque) (1pt)
A: AGe 65-74 (1pt)
Sc: Sex Category (1pt)
IF 2+ then get warfarin or DOAC.
What is DAPT? How is duration determined?
DAPT: Aspirin and P2Y12 inhibitor (clopidogrel, ticagrelor) indicated for ACS, CAD , and also PAD.
DURATION: DAPT determined by indication.
*IF DAPT for ACS– > then ≥ 12 mos regardless of whether BMS, DES, or no stent
*IF DAPT for stable CAD –> then depends on type of stent.
-DES: at least 6 months of DAPT
-BMS: at least 1 month of DAPT
*IF bleeding risk:
-cont 1 drug (ASA or clopidogrel) after 4 months
*IF afib:
-warfarin/DOAC. d/c aspirin. NO triple tx
*IF mechaical value
-warfarain + clopidogrel.
What are 2 types of temporary pacemakers? What are indications for temporary pacemaker?
TYPES of temporary pacemaker:
-transvenous or trancutaneous
INDICATIONS:
-asystole
-symptomatic bradycardia (includes sinus brady w/hypotension)
-bilateral bundle branch block (BBB)
-overiding pacing for torsade de pointes
What are indications for PERMANENT pacemaker?
-symptomatic bradycardia
-asymptomatic high-grade AV block (3rd degree block OR 2nd-degree AV block, mobitz type 2)
-alternating bundle branch
-afib + tachycardia (tachy-brady symptom)
*Note, 2nd degree AV block, Mobitz type 1 (aka Wenckeback block) only requires tx if pt sx –>then becomes “symptomatic bradycardia”
What is duration of DAPT based on stent if CAD
For bare metal stent: at least 1 month
For drug-eluting stent: at least 6 months
What is regimen for pts following STEMI
BB w/in 24hrs
ACE-I w/in 24hrs
Keep bsg <180
Statin
sprionolactone if EF <40%
DAPT (ASA, clopidogrel) for at least 1yr
What is dx for LBBB
1) left axis deviation (I, avf)
2) wide QRS (>3 boxes)
3) V1: neg QRS, with pos ST
4) V6: pos QRS, with neg ST
What is dx for LVH
1) avl: R >12mm
2) V1 Swave + R wave in V5/V6 > 35mm
3) avL R wave + V3 s wave >28mm M/20 mm F
Desc HCM. What EKG findings?
HCM
-autosomal dominant
-thickened left ventricle
-murmur (like AS): crescendo descrendo systolic murmur along LEFT sternal border
-Louder w/standing or Valsalva
-Decr with sustained handgrip
-Tx: BB, CCB
-ICD: arrhythmia, SCD in two 1st family members, myocardium thickness >30mm (>3cm) anywhere in left ventricle, unexplained syncopal episode
EKG findings:
-LVH, left atrial enlargement
-deeply inverted T waves (V3-V6) mimics ischemia
Describe type B aortic dissection
Description: tear in DESCENDING aorta only (distal to the subclavian artery)
Dx: CTA
Tx: IV BB (1st line) –>CCB (if BB contraindicated 2/2 reactive airway dx)
Describe type A aortic dissection
-tear in ascending aorta, arch
-Dx: CTA 1st (or TEE)
Tx: emergent surgery;
What is goal BP for HTN tx
Goal <130/80. There are TWO exceptions:
(1) low risk pt w/ASCVD <10% and stage 1 HTN, goal can be <140/90 (also w/pre-eclampsia, pheo)
(2) CKD pts, SBP goal <120 (also w/aortic dissection)
What is hypertensive URGENCY
Severe incr in BP BUT pt is otherwise stable.
-Tx: incr meds w/close outpt followup
What is hypertensive emergency
THIS requires hospitalization. See sx/symptoms of end-org damage
-blood pressire: >180/120
Describe 4 scenarios for statin treatment. Which 2 are high-intensity. What is high-intesntiy statin
(1) LDL ≥ 190 : high-intensity statin
(2) LDL 70-189 AND 40-75yrs and ASCVD ≥ 20%: high-intensity
(3) LDL 70-189 AND 40-75yrs and DM : mod/high
(4) Clinical ASCVD*: high
*Clinical ASCVD: ACS, stable or unstable angina, coronary artery revascularization, stroke/TIA, or PAD
HIGH intensity statin:
40-80mg atorvastatin, 20-40mg rosuvastatin
**The 10-year risk for ASCVD can be categorized as low (<5%), borderline (5% to <7.5%), intermediate (≥7.5% to <20%), or high (≥20%).
What is medium intensity statin
10-20mg atorvastain, 20-40mg simvastatin
Desc renal artery HTN
Secondary HTN
-seen in young female, fibromuscular dysplasia
-Tx: ACE-I/ARB
-Dx: renal u/s; definitive angio
What is tx for HFrEF
(1) ACE-I/ARB
(2) BB
(3) Diuretics
(4) SLG-2 inhibitor
(5) Spironolactone
**Blk pts: hydralazine+ isosorbide dinitrate
What is tx for HFpEF
**BP control + diuresis
(1) ACE-I/ARB
(2) Diuretics
(3) SLG-2 inhibitor
Is BB a good 2nd line tx for HTN
No, unless pt has h/o MI or angina.
S4 gallop is common in which type of pts
HTN
What are causes of secondary HTN
1) renovascular: elevated renin, abd bruit, renal u/s for dx, ACE-I/ARB for tx
2) hyperaldostronism: low k, metab alk, low renin
What are 1st line tx for HTN
-thiazide diuretics (chlorthalidone), ACE-I/ARB, CCB (amlodipine)
What ppx is given to pt with infective endocariditis who is allergic to PCN.
1st line tx is amoxicillin (2g po 15mins prior to dental procedure)
IF PCN allergy, then:
-clindamycin
-cephalexin
-azithromycin or clarithyromycin
What is a Still murmur
- Innocent murmur
-Brief, vibratory, grade 1-3 midsystolic low-pitched murmur
-heard at LL sternal border, sometimes radiates to cardiac apex
-Louseds in supine and diministhes in intenstity w/sitting or standing up
-Seen in young adult (often before they participate in comeptitice sports, get hx )
What class of cardiac drugs cause symptomatic orthostatic HTN
nonselective alpha-blockers–relax smooth muscle in bladder and prostate, often rx for BPH –BUT orthostatic hypotension esp common with 2 agents–> doxazosin, terazosin
*Other alpha blockers (tamsulosin, silodosin) are mor selective for prostate tissue
**NOTE: BB may case bradycardia or exacerbate hypotension BUT does not generally cause profound orthostatic HTN
What is the most common cause of syncope
Vasovagal: syncope caused by reflex-mediated reduction in vascular tone, heart rate, or both.
Do you need to order cardiac testing pre-operatively for elective surgery in pt w/stable CAD and/or no cardiac sx
No. Guidelines recommend no perioperative testing in pts who’s functional capacity is >4 METS (metabolic equivalents). Pts who can climb 1 flight of steps are considered to be at this level. Of note, do exclude active cardiac issues ( unstable coronary dx, HF with volume overload BUT if surgery emergency, can bypass)
Descr AS
-Sx: angina, HF, syncope (w/exercise)
-Murmur: mid-to late peaking (diamond shaped) ejection murmur +/- ejection click; decr absent S2 (2/2 decr mobility of aortic valve leaflets), paradoxical S2 split (becs stenotic valve closes AFTER pulmonary valve)
-PE: carotid pulse (parvus et tardus–weak amplitude and delayed), S4 gallop,
**murmur transmits to carotids–think AS. IF normal, consider aortic sclerosis
-Prognosis: pt’s w/symptomatic severe AS have 10% risk of suddent death.
-Dx: echo (as w/all valvular heart dx)
Tx: SAVR»_space; RAVR. Medical tx NOT effective
What valvular conditions can be treated with afterload reduction
-chronic AR, MR
-Use ACEI/ARBs for afterload reduction. You can use diuretics to tx sx od volume overload
NOTE Surgery indicated for:
(1) AR: Aortic valve REPLACEMENT (AVR) if (1) symptomatic severe AR (2) asx severe defined as LVEF <55% or LV enlargement with LV end-systolic diameter ≥ 50 mm
(2) MR: valve REPAIR surgery if (1) symptomatic severe MR (2) Asx severe defined as LVEF <60% or LV enlargement with LV end-systolic diameter ≥ 40mm
What is syncope? What are main causes
Syncope
-Definition: sudden transient loss of consciousness w/loss of postural tone followed by SPONTANEOUS recovery. Different from other types of loss of consciousness such as seizures or narcolepsy.
CAUSES
(1) neurocardiogenic
(2) Cardiac
(3) Orthostatic hypotension
(4) Meds **a-blockers for BPH –>terazosin, prazosin
What are sxs of neruocardiogenic syncope? What are subtypes of neruocardiogenic syncope?
Neurocardiogenic syncope:
(1) SX: dizziness/ prodromal featuers (n/w etc_ +/- myoclonic jerks mimicking seizure
SUBTYPES:
(1) Vasovagal. most common. Triggered by intense emotion, standing, ETOH, heat. Typically have prodrome (ie nausea/vomitting)
(2) Situational. brought by SPECIFIC scenarios-cough, micturition, straining
(3) Caroid sinus hypersensitivity. Dx with pause of >3sec during carotic sinus massage
When do you use tilt-table to dx syncope
Tilt=table used to diagnose neurocardiogenic syncope
Type A dissection usu causes what type of regurge? what type of MI?
Type A dissection (acending aorta) can cause
=new AR
=hemopericardium with TAMPONADE
=inferior MI (due to invovlement of right coronary artery).
-Dissection typically presents w/severe anterior chest pain +/- severe interscapulary back pain
Don’t be fooled –treat AS (CTA for dx, emergent surgery ) FIRST. NOT AR or MI….
What are 8 absolute contraindications to fibrinolytic tx
1) Stroke
-hemorrhagic ever/any
-ischemic (past 3mos)
2) intracranial neoplasm
3) suspect aortic dissection
4) active bleeding
5) severe face/head trauma
6) neurosurgery/spine surgery (past 2 mos)
7) persistent severe HNT unresponsive to medical tx
8) active bleeding
What are 3 main causes of ST segment elevation. What are 4 causes you also nee to remember
(1) Acute STEMI
(2) Coronary vasopastic (Prinzmetal) angina
(3) Pericarditis (will also see PR DEPRESSIONS)
**Don’t forget about
(1) early repolarization variant (<40yrs, J wave)
(2) stress-induced (takotsubo) cardiomyopathy
(3) LBBB
(4) hypothermia (J wave aka Osborn wave)
Describe prizmetal angina vs microvacular angina
Prinzmetal angina (aka coronary spasms_
-Def: coronary spasms cause vasospastic angina
-Transient ST elevations
-Tx: CCB, nitrates
Microvascular angina
-Def: Angina w/ischemic changes on cardiac stress test BUT visually normal coronary arteries on angiogram. Type of ischemia with No Obstructive Coronary Artery Disease (INOCA)
-Dx: adenosine or acetylcholine provocation via intracoronary injection. Cardiac MRI perfusion imaging and cardiac PET can also be helpful
REVIEW
1) DIFFUSE ST changes –>think pericarditis. LOOK for PR depressions
2) TRANSIENT ST changes– > think prinzmetal. LOOK for coronary distribution BUT transient
3) ST elevations that are CONCAVE up (happy face)
-IF diffuse (with PR depressions) –> pericarditis
-IF young (<40yrs) and no reciprocal ST depressions + notching (V4/V5) think : EARLY repolarization
4) ST elevations CONCAVE dwn -
-> STEMI
–>IF visually normal angio –>microvascular angina
What is target INR for mechanical valves
Use warfarin only
Aortic: av INR 2.5
Mitral: INR 3.0
You are performing chest compressions on pt who goes into asystole. What should you do?
ACLS–for non shockable rhythm–give epinephrine ASAP. Remember to used CLOSED LOOP communication
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What is the most common cardiac tumor
Atrial myxoma. Often composed of gelatinous material w/irregular borders
Sx:stroke, TIA, syncope, arrithyma
Definitive tx: surgical excision
Desc aortic regurge and mitral regurge murmurs
AORTIC REGURGE
(1) Chronic AR
-2/2 valve deformity, Marfan
-decsrendso diastolic, high-pitched
-1st: afterload reduc: ACE-I/ARB
-surgery(AV replacement): LVEF <55%
(2) Acute AR
-2/2 endocarditis, dissection
-short diastolic murmur (NO bounding pulse); CO/BP LOW
-1st: Urgent Surgery
MITRAL REGURGE
(1) Chronic MR
-holosystolic murmur, heard @ apex, radiates to axilla
-1st: afterload reduc: ACE-I/ARB
-surgery(AV replacement): LVEF <60%
(2) Acute MR
-descrescrendo, systolic murmur @ apex
-Urgent surgery
**Note AS: murmur @ RUSB and radiates to carotids and also apex. MR heart @ apex and radiates to axilla
what is a long term sequale of kawasaki dx. What 5 symptoms should make you think Kawasaki
coronary thrombus
**The most dangerous complication of Kawasaki is coronary aneurysm which over time can cause myocardial infarction 2/2 thrombosis. Rare complication men»_space;women
KAWASAKI
-rash (childhood) involves MOUTH
-febrile illness, affects medium-sized vessels, manifests with: (1) fever (2) lymphadenopathy (3) conjunctivitis (4) RASH (palms & soles ) (5) erythematous mucosa (strawberry tongue)
What is the connection btwn prolonged Qtc and torsades
With prolonged Qtc there is a tendency to develop polymorphic Vtach. If prolonged Qtx is from bradycardia, the polymorphic Vtach called Torsades.
What are some causes of prolonged QTc.
Prolonged QTC: >450 ms
1) HYPOcalcemia
2) HYPOmagenesium
3) HYPOkalemia
4) TCA overdose
5) Several meds
-antipsychotics
-abx
-antihistamies
-opiods
After return of spontaneous circulation, a comatose pt recovering from cardiac arrest should be treated with what?
Targeted temperature management
What is treatment for ventricular tachycardia?
IF STABLE: amiodarone
IF UNSTABLE –>cardioversion!!
-hypotension
-change in mental status
-angina
-PULMONARY EDEMA
What leads do you use for RBBB and LBBB
Leads V1, V6
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