Freebase(0.00 / 0 votes)Rate this definition: Chronotropic. Chronotropic effects are those that change the heart rate. Chronotropic drugs may change the heart rate by affecting the nerves controlling the heart, or by changing the rhythm produced by the sinoatrial node. Positive chronotropes increase heart rate; negative chronotropes decrease heart rate.
Erectile dysfunction (ED), formerly known as impotence, is the inability to achieve or maintain an erection long enough to engage in sexual intercourse. Under normal circumstances, when a man is sexually stimulated, his brain sends a message down the spinal cord and into the nerves of the penis.
A Doctor of Education (Ed.D) is a terminal degree designed for students looking to pursue leadership positions in schools, colleges, and school districts as well as government organizations. Graduates of Ed.D programs commonly pursue careers in administration, research, and education policy-making.Sources: *U.S.areer Options. Ed.D. degree programs can take from two years to five years to complete. They can include classes in educational research and educational policy as well as gender, economic and social roles in education.