Intermitent Korotkoff Sounds - All Korotkoff Sounds =<unk>  Pressure (normal = <10mmHg)
Inflate manual BP cuff until Korotkoff sounds disappear
Slowly deflate the cuff until Korotkoff sounds re-appear
At the highest BP when you hear sounds intermittently (rather than with every heart beat), note the blood pressure
This corresponds to the systemic blood pressure occurring during expiration
Keep slowly deflating the cuff until you reach the highest BP when you hear sounds with every beat (no longer intermittent)
This corresponds to the systemic blood pressure during inspiration
The difference between two pressures is the<unk> "
>10 mmH is considered significant
At the highest BP when you hear sounds intermittently (rather than with every heart beat), note the blood pressure
This corresponds to the systemic blood pressure occurring during expiration
This corresponds to the systemic blood pressure during inspiration
>10 mmH is considered significant
Severe<unk>  can be palpated in the pulse as a weakening or disappearance of the pulse during inspiration
Abnormal = >10mmHg
Tamponade
Sensitivty = 80%
+LR = 3.3
-LR = 0.03
Sensitivty = 80%
+LR = 3.3
-LR = 0.03
Pulsus paradoxus
Moderate to severe cardiac tamponade
Low ECG voltage
Constrictive pericarditis
AVR ST elevation
Active COPD/asthma exacerbation
Chest wall pain
Paradoxical vocal fold motion