Complementary Alternative Cardiovascular Medicine
Complementary Alternative Cardiovascular Medicine
Complementary Alternative Cardiovascular Medicine
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Chapter 15 / Aromatherapy and CVD 241<br />
Aromatherapy was not mentioned in Eisenberg’s 1993 landmark study<br />
(3). This study showed nonconventional medicine to be a serious consumer-led<br />
commodity, with one in three Americans using complementary<br />
therapies. However, 5 yr later in Eisenberg’s second study (4),<br />
aromatherapy was used by 5.6% of the adult patient population (n = 2055<br />
adults).<br />
DEFINITIONS<br />
Aromatherapy is the use of essential oils for therapeutic purposes that<br />
encompass mind, body, and spirit (5). The name aromatherapy leads<br />
people to believe that the therapy is purely about smelling scents, but this<br />
belief is incorrect (6). There are many different kinds of aromatherapy,<br />
ranging from a nice-smelling candle to the clinical application of essential<br />
oils for medicinal reasons (7). Only the role of clinical aromatherapy<br />
has a place in a cardiology text.<br />
The definition of essential oils is specific—they are “the steam distillates<br />
of aromatic plants” (8). Therefore, any extract not obtained by<br />
steam distillation is not an essential oil and is relevant for use in<br />
aromatherapy. Essential oils are found in the flowers, leaves, bark, wood,<br />
roots, seed, and peels of aromatic plants and are stored in microscopic<br />
cellular containers of the plant, i.e., cells, glands, ducts, and hairs. Essential<br />
oils are highly volatile, complex mixtures of chemical constituents<br />
divided into functional groups, such as ketones, alcohols, terpenes, and<br />
esters. The proportions of these individual constituents vary according<br />
to the species of plant, climate where grown, and distillation process<br />
used. It is the chemistry of an essential oil that determines its therapeutic<br />
properties.<br />
SCIENTIFIC BASIS<br />
The pharmacologically active components in essential oils work at<br />
psychological and physical levels. Aroma effects can be rapid, and,<br />
occasionally, just thinking about a smell can have a powerful effect. This<br />
effect can be relaxing or stimulating, depending on the individual’s<br />
experiences, as well as the chemistry of the essential oil used. Essential<br />
oils can be absorbed into and through the skin in minutes. They are<br />
lipophyllic (fat soluble) and nonpolar (do not mix with water) and are<br />
excreted through respiration, the kidneys, and insensate loss.<br />
Each essential oil is composed of between 1 and 300 different chemical<br />
components. These separate olfactory stimulants travel via the nose<br />
to the olfactory bulb. From there, nerve impulses continue to the limbic<br />
system of the brain, an inner complex ring of brain structures below the