PE tidbits

Question 1

Bainbridge reflex

Answer 1

thought to be component of RSA – inspiration cause HR to speed up d/t vagal tone decrease as LA filling pressure increases and negative thoracic pressure increases (Bainbridge = increase in LA pressure decreases vagal tone to increase HR?) – Increase in venous return accelerates HR. (Stretch of SA node  sinus tachycardia per Katz)

Question 2

Delirium cordis

Answer 2

irregularly irregular rhythm of afib

Question 3

Reynold’s number

Answer 3

relationship of murmurs to vessel size, flow velocity and blood viscosity
= (Radius x velocity x density) / viscosity

Question 4

Parvus et tardus

Answer 4

small/weak pulses with delayed systolic peak (e.g., SAS)

Question 5

Corrigan’s pulse

Answer 5

bounding, “water hammer” pulses e.g., PDA, AV fistula, AR

Question 6

Pulsus alternans

Answer 6

alternating strong and weak during sinus rhythm (e.g., severe myocardial failure)

Question 7

Pulsus bigeminus

Answer 7

pulse strength alternates with arrhythmias e.g., ventricular bigeminy

Question 8

Pulsus paradoxus

Answer 8

inspiratory fall in SAP exceeding 10 mmHg (e.g., pericardial dz, pericardial effusion & tamponade)