Question
The SA node is situated at the junction of:
The correct answer is
SVC and RA
SA Node Location Identified
The Sinoatrial (SA) node, the heart's primary natural pacemaker, is located in a specific anatomical position.
SA Node Anatomical Placement
The SA node is situated within the wall of the heart chamber where the major vein carrying deoxygenated blood from the upper body connects.
- The Superior Vena Cava (SVC) brings deoxygenated blood from the upper body into the heart.
- The Right Atrium (RA) is the chamber that receives this blood.
- The SA node resides at the superior aspect (top) of the right atrium, near the entrance point of the SVC.
Therefore, the SA node is found at the junction of the SVC and the RA.
Correct Option Analysis:
- Option 1: SVC and RA - This matches the known anatomical location.
- Option 2: SVC and LA (Left Atrium) - Incorrect. The SA node is in the right side.
- Option 3: LA and LV (Left Ventricle) - Incorrect. This is the left side of the heart.
- Option 4: IVC (Inferior Vena Cava) and RA - Incorrect. While the IVC also enters the RA, the SA node is specifically near the SVC junction.
Conclusion: The SA node is located at the junction of the SVC and RA.
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Important Questions from General Clinical Conditions
- In which of the following SA node dysfunction conditions, permanent pacing may NOT be required?
1. Beta blocker drugs
2. Narcotic drugs
3. Iatrogenic-Post RT/Surgery
4. Hypothyroidism
5. Sick sinus syndrome
6. Raised Intracranial tension
Select the correct answer using the code given below. - Consider the following statements regarding Weight Loss:
1. 4.5 kg over 6-12 months
2. 10 kg over 6-12 months
3. More than 5% over 6-12 months
4. More than 10% over 6-12 months
Which of the above constitute significant or clinically important weight loss? - The ‘Y' descent in JVP waveform represents:
- While distinguishing a venous pulsation from the arterial pulsation in neck, which of the following is NOT correct?
- Regardless of the infectious agent, the most characteristic symptom of infectious esophagitis is:
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