274 - Starling Curve, Resistance, Pressure, Flow

Starling Curve

Force of contraction is proportional to what?

Starling Curve

Enddiastolic length of cardiac muscle fiber
(preload) is proportional to what?

Starling Curve

What do catecholamines do to contractility?

Starling Curve

What do positive inotropes (eg digoxin) do to contractility?

Starling Curve

What does loss of myocardium (eg MI) do to contractility?

Starling Curve

What do β-blockers (acutely) do to contractility?

Starling Curve

What do non-dihydropyridine Ca2+
channel blockers do to contractility?

Starling Curve

What does dilated cardiomyopathy do to contractility?

Starling Curve

There is increased contractility with what?

Starling Curve

There is decreased contractility with what?

Resistance, pressure, flow

ΔP = ?

Resistance, pressure, flow

Q × R = ?

Resistance, pressure, flow

Similar to Ohm’s law: ΔV = ?

Resistance, pressure, flow

Volumetric flow rate (Q) = ?

Resistance, pressure, flow

flow velocity (v) ×
cross-sectional area (A) = ?

Resistance, pressure, flow

driving pressure (ΔP) / flow (Q)
= ?

Resistance, pressure, flow

(8η (viscosity) × length) /
(πr4)
=?

Total resistance of vessels in series?

Total resistance of vessels in parallel?

What have the highest total cross-sectional
area?

What have the lowest flow velocity?

What drives flow from high pressure
to low pressure?

Pressure gradient drives flow from what to what?

What account for most of TPR?

Arterioles account for most of what?

What provide most of blood storage capacity?

Veins provide most of what?

Viscosity depends mostly on what?

What depends mostly on hematocrit?

What happens to viscosity in hyperproteinemic states (eg,
multiple myeloma)?

What happens to viscosity in polycythemia?

What happens to viscosity in anemia?