High blood pressure (hypertension)
High blood pressure (hypertension) results from increased resistance
to flow. This may be because vessels are narrowed or because the
blood is more viscous than normal. Increased cardiac output does
not cause sustained hypertension, but can produce a transient
Emotional stresses of all kinds are reflected in the blood pressure.
Excitement, agitation or annoyance stimulates sympathetic nervous
activity, which accelerates the heart and contracts arteriolar
muscle, both of which effects cause hypertension. A heated argument
can raise blood pressure to as much as 240 mm (systolic)/130 mm
(diastolic) - normal values are 120/80.