NBME CBSE & USMLE Step 1 Exam Prep | 226 Practice Questions, Answers & Comprehensive Medical Review

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NBME CBSE & USMLE Step 1 Exam Prep | 226 Practice Questions, Answers & Comprehensive Medical Review

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NBME CBSE & USMLE Step 1 Exam Prep | 226 Practice Questions, Answers & Comprehensive Medical Review

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NBME CBSE TESTNBME
EXAMCBSE
REALTEST
EXAMEXAM
226 QUESTIONS
REAL EXAMAND
226 ANSWERS
QUESTIONS
8/11/2026,LATEST
1:11:32
AND ANSWERS
PM
2024 (usmle
LATEST
step 1)MEDICAL
2024 (usmle
EXAMINATION.pdf
step 1)MEDICAL EXAMINATION.pdf

NBME CBSE TEST EXAM REAL EXAM 226 QUESTIONS AND
ANSWERS LATEST 2024 (usmle step 1)MEDICAL EXAMINATION
Bulbus cordis - CORRECT ANSWERS Smooth parts (outflow tract) of left and right
ventricles

endocardial cushions - CORRECT ANSWERS Atrial septum, membranous interventricular
septum; AV and semilunar valves

neural crest

left horn of the sinus venosus - CORRECT ANSWERS coronary sinus

posterior, sub cardinal, and supra cardinal veins - CORRECT ANSWERS IVC

Right common cardinal vein and right anterior cardinal vein - CORRECT ANSWERS SVC

Right horn of sinus venosus - CORRECT ANSWERS Smooth part of right atrium (sinus
venarum)

Patent foramen ovale - CORRECT ANSWERS failure of septum primum and septum
secundum to fuse after birth

Transposition of the great vessels
Tetralogy of Fallot
Persistent truncus arteriosus - CORRECT ANSWERS Conotruncal abnormalities
associated with failure of neural crest cells to migrate

ductus venosus - CORRECT ANSWERS connects the umbilical vein to the inferior vena
cava, bypassing the liver

becomes ligamentum venosum

phrenic nerve - CORRECT ANSWERS innervates the diaphragm and pericardium

NBME CBSE
NBME
TEST
CBSE
NBME
EXAM
TEST
CBSE
REAL
EXAM
TEST
EXAM
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EXAM
226EXAM
QUESTIONS
REAL
226EXAM
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226 ANSWERS
QUESTIONS
AND ANSWERS
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(usmle
1)MEDICAL
2024
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EXAMINATION.pdf
step 1)MEDICAL
EXAMINATION.pdf
EXAMINATION.pdf

,NBME CBSE TESTNBME
EXAMCBSE
REALTEST
EXAMEXAM
226 QUESTIONS
REAL EXAMAND
226 ANSWERS
QUESTIONS
8/11/2026,LATEST
1:11:32
AND ANSWERS
PM
2024 (usmle
LATEST
step 1)MEDICAL
2024 (usmle
EXAMINATION.pdf
step 1)MEDICAL EXAMINATION.pdf

NBME CBSE TEST EXAM REAL EXAM 226 QUESTIONS AND
ANSWERS LATEST 2024 (usmle step 1)MEDICAL EXAMINATION
S3 heart sound - CORRECT ANSWERS Increased ventricular filling pressure (e.g., mitral
regurgitation, HF), common in dilated ventricles

normal in kids and pregnant women

S4 heart sound - CORRECT ANSWERS atrial kick late diastole, right before S1

best heard at apex in LLD position

High atrial pressure.

Stiff/hypertrophic ventricle (aortic stenosis, restrictive cardiomyopathy)

Always abnormal

atria contract - CORRECT ANSWERS a wave of JVP

c wave - CORRECT ANSWERS RV contraction (closed tricuspid valve bulging into atrium)
wave of JVP

x descent - CORRECT ANSWERS JVP wave corresponding to downward displacement of
closed tricuspid valve during rapid ventricular ejection phase

reduced or absent in tricuspid regurge

V wave - CORRECT ANSWERS JVP wave corresponding to inc'd RA pressure due to filling
against closed tricuspid valve

y descent - CORRECT ANSWERS JVP wave corresponding to RA emptying into RV

absent in cardiac tamponade

NBME CBSE
NBME
TEST
CBSE
NBME
EXAM
TEST
CBSE
REAL
EXAM
TEST
EXAM
REAL
EXAM
226EXAM
QUESTIONS
REAL
226EXAM
QUESTIONS
AND
226 ANSWERS
QUESTIONS
AND ANSWERS
LATEST
AND ANSWERS
2024
LATEST
(usmle
2024
LATEST
step
(usmle
1)MEDICAL
2024
step
(usmle
1)MEDICAL
EXAMINATION.pdf
step 1)MEDICAL
EXAMINATION.pdf
EXAMINATION.pdf

,NBME CBSE TESTNBME
EXAMCBSE
REALTEST
EXAMEXAM
226 QUESTIONS
REAL EXAMAND
226 ANSWERS
QUESTIONS
8/11/2026,LATEST
1:11:32
AND ANSWERS
PM
2024 (usmle
LATEST
step 1)MEDICAL
2024 (usmle
EXAMINATION.pdf
step 1)MEDICAL EXAMINATION.pdf

NBME CBSE TEST EXAM REAL EXAM 226 QUESTIONS AND
ANSWERS LATEST 2024 (usmle step 1)MEDICAL EXAMINATION

plusus parvus et tardus - CORRECT ANSWERS pulses are weak with delayed peak

Aortic stenosis

PR interval - CORRECT ANSWERS 0.12-0.20 seconds

120 milliseconds

QT interval length - CORRECT ANSWERS 9 - 11 squares = .36 to .44 seconds

Hypokalemia - CORRECT ANSWERS U wave present on ECG

Mg sulfate - CORRECT ANSWERS for torsades de pointe, hypokalemia (can lengthen QT
and cause torsades), and pre-eclampsia (prevent seizures)

Romano-Ward syndrome - CORRECT ANSWERS -Congenital long QT syndrome
-Autosomal dominant, pure cardiac phenotype (no deafness).

Jervell and Lange-Nielsen syndrome - CORRECT ANSWERS -Congenital long QT
syndrome
-Autosomal recessive, sensorineural deafness

Brugada syndrome - CORRECT ANSWERS -Autosomal dominant disorder affecting Na
channels most common in Asian males.
-ECG pattern of pseudo-right bundle branch block and ST elevations in V1-V3 (anterior
ventricular septum)
-inc risk of ventricular tachyarrhythmias and sudden cardiac deatgh

Prevent SCD with implantable cardioverter-defibrillator (ICD).

NBME CBSE
NBME
TEST
CBSE
NBME
EXAM
TEST
CBSE
REAL
EXAM
TEST
EXAM
REAL
EXAM
226EXAM
QUESTIONS
REAL
226EXAM
QUESTIONS
AND
226 ANSWERS
QUESTIONS
AND ANSWERS
LATEST
AND ANSWERS
2024
LATEST
(usmle
2024
LATEST
step
(usmle
1)MEDICAL
2024
step
(usmle
1)MEDICAL
EXAMINATION.pdf
step 1)MEDICAL
EXAMINATION.pdf
EXAMINATION.pdf

, NBME CBSE TESTNBME
EXAMCBSE
REALTEST
EXAMEXAM
226 QUESTIONS
REAL EXAMAND
226 ANSWERS
QUESTIONS
8/11/2026,LATEST
1:11:32
AND ANSWERS
PM
2024 (usmle
LATEST
step 1)MEDICAL
2024 (usmle
EXAMINATION.pdf
step 1)MEDICAL EXAMINATION.pdf

NBME CBSE TEST EXAM REAL EXAM 226 QUESTIONS AND
ANSWERS LATEST 2024 (usmle step 1)MEDICAL EXAMINATION
Wolff-Parkinson-White Syndrome - CORRECT ANSWERS Most common type of
ventriuclar pre-excitation sydnrome. Abnormal fast accessory conduction pathway from atria to
venricle bypasses the rate-slowing AV node causing a delta wave and widening QRS with
shortened PR interval. Could lead to a reentrant circuit and suprvaventicular tachy.

First degree AV block - CORRECT ANSWERS - PRI >5 boxes/.20 sec (200 msec)
- Fixed but prolonged PRI
(consistent but long)
- normally get bradycardia here

second degree AV block mobitz type 2 - CORRECT ANSWERS -PR interval is constant
-atrial conduction to ventricle is intermittent: dropped QRS without increasing PR interval length
-disease below AV node in His bundle

may progress to 3rd degree/complete AV block

Second Degree AV Block Mobitz Type 1 (wenckebach) - CORRECT ANSWERS
Progressive lengthening of pr interval leading to dropped QRS

third degree AV block - CORRECT ANSWERS The atria and Ventricles are totally
dissociated.
-So, the QRSs and the P waves have no relation to each other.

PCWP - CORRECT ANSWERS 4-12 mmHg
est of LA pressure

Williams Syndrome - CORRECT ANSWERS a genetic condition characterized by mental
retardation in most regards but surprisingly good use of language relative to their other abilities,
elfin facies
Chromosome 7
assoc with supravalvular aortic stenosis

NBME CBSE
NBME
TEST
CBSE
NBME
EXAM
TEST
CBSE
REAL
EXAM
TEST
EXAM
REAL
EXAM
226EXAM
QUESTIONS
REAL
226EXAM
QUESTIONS
AND
226 ANSWERS
QUESTIONS
AND ANSWERS
LATEST
AND ANSWERS
2024
LATEST
(usmle
2024
LATEST
step
(usmle
1)MEDICAL
2024
step
(usmle
1)MEDICAL
EXAMINATION.pdf
step 1)MEDICAL
EXAMINATION.pdf
EXAMINATION.pdf

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Uploaded on: August 16, 2026
Number of pages: 37
Written in: 2026/2027
Type: Exam (elaborations)
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