"nervous heart" is correct and usable in written English.
You can use it to describe a feeling of fear or anxiety, such as, "Her hands were shaking, and her nervous heart raced."
The BAI items with the highest baseline frequencies were: unable to relax, nervous, heart pounding, terrified or afraid, and fear of the worst happening.
The hysterical symptoms she displays - "nervous heart trouble", panic attacks, a tendency towards mental breakdown - were all, Williams believed, indicative of suppressed desires.
I traveled to India with a nervous heart and swollen belly.
The cops are there!" "Is this a joke?" I was holding a stack of colored paper, trying to calm my beating, nervous heart, little beads of sweat glistened on my brow from the afternoon sun.
Lancaster sent on the comparatively experienced Brad Barritt for debutant Jack Nowell and Dave Attwood for the excellent Lawes as the game entered the final quarter and chill fingers and nervous hearts increased the error count.
KCNQ1 5 (Kv7.1 7.5) subunits assemble to form a variety of functional K+ channels in the nervous system, heart, and epithelia.
Myotonic muscular dystrophy may also affect the central nervous system, heart, gastrointestinal tract, eyes, and endocrine glands.
Studies of animal ESC derivatives have demonstrated that these cells are capable of regenerating tissues of the central nervous system, heart, skeletal muscle, and pancreas.
If lightning strikes a person, the stroke current can damage the central nervous system, heart, lungs, and other vital organs (see electrical shock).
The most common site of involvement is the long bones of the axial skeleton, which is seen almost universally, followed by the nervous system, heart, lungs, orbit and retroperitoneum, which are seen in up to 50% of cases.
As neurotransmitters carry the impulse to the sympathetic nervous system, heart and breathing rates increase, muscles tense, and blood flow is diverted from the abdominal organs to the brain.
