FIRST DISTRICT COURT OF APPEAL
                STATE OF FLORIDA
                  _____________________________

                          No. 1D16-5673
                  _____________________________

CITY OF JACKSONVILLE and CITY
OF JACKSONVILLE RISK
MANAGEMENT,

    Appellants,

    v.

ADRIAN O’NEAL,

    Appellee.
                  _____________________________


An appeal from an order of Judge of Compensation Claims.
Ralph J. Humphries, Judge.

Date of Accident: January 10, 2013.

                         March 15, 2018

PER CURIAM.

     In this workers’ compensation case, the Employer/Carrier
(E/C) seeks review of an order of the Judge of Compensation
Claims (JCC) addressing four different dates of accident. The E/C
challenges only the ruling of compensability and award of benefits
for heart disease with a date of accident of June 26, 2002 (no
statute of limitations defense is asserted). As to this ruling, we
reverse in part, and remand for additional findings of fact.

    Claimant, a correctional officer since 1995, relied on section
112.18, Florida Statutes, which provides a presumption of
occupational causation for heart disease in correctional officers.
§ 112.18, Fla. Stat. (2002). The E/C argued that Claimant has an
underlying genetic condition (never specified), but the facts
established that it could be “triggered” to result in heart disease
(also never specified beyond the generic term “arrhythmias”). The
JCC found the E/C did not overcome the statutory presumption,
accepting the medical evidence that there exists at least one
identifiable occupational trigger for this individual claimant’s
arrhythmia in this particular job – “adrenaline in the form of
stress.” However, the JCC never named the genetic condition, and
was vague about the resulting diagnosis, such that we cannot infer
them here, because the record contains many candidates for both:
left atrial tachycardia, left atrial fibrillation, “left atrial
tachycardia degenerating into atrial defibrillation,” “exercise
induced wide complex tachycardia,” “incomplete right bundle
branch block,” and “supraventricular tachycardia” (SVT) – which
one doctor described as “a big catch-all term.” These diagnoses are
not indistinguishable: the JCC found tachycardia to be a “fast
heart rate” and fibrillation to be, in contrast, an “irregular fast
rhythm,” and at least one medical expert testified that at least one
non-occupational trigger “has been implicated in the development”
of atrial fibrillation but not atrial tachycardia.

     Trigger theory analysis requires an underlying condition, a so-
called “trigger,” and resulting heart disease. See, e.g., Gonzalez v.
St. Lucie Cty.–Fire Dist., 

(Fla. 1st DCA 2016)
(underlying condition was “dual AV node physiology,” trigger was
not determined by the JCC (the case was remanded for a
determination on this), and resulting heart disease was
arterioventricular node reentrant tachycardia (AVNRT)); Mitchell
v. Miami Dade Cty., 

(Fla. 1st DCA 2016) (underlying
condition was “congenital slow accessory pathway,” trigger was not
determined by the JCC (the case was remanded for a
determination on this), and resulting diagnosis was SVT). Because
the precise condition was not identified in this case, the JCC’s
orders lack sufficient detail for this Court to determine whether
“trigger theory” is appropriate here. The parties are likewise
culpable for using imprecise wording throughout the proceedings.

    Identification of the underlying condition and resulting
diagnosis is essential here to delineate the scope of the E/C’s

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potential liability under the Workers’ Compensation Law. Cf.
Jackson v. Merit Elec., 

, 383 (Fla. 1st DCA 2010)
(“This dispute might never have arisen if the parties and the JCC
took care to define the compensable injury.”). Absent an
identification, it is unclear whether the medical testimony
supports the JCC’s application of “trigger theory” to Claimant’s
situation such that we remand to the JCC for additional findings
of fact and reconsideration on this point. The JCC may, in his
discretion, reopen the medical evidence to address the matter.
Mitchell v. Miami Dade Cty., 

, 69 (Fla. 1st DCA 2016).

B.L. THOMAS, C.J., and MAKAR and WINOKUR, JJ., concur.

                 _____________________________

    Not final until disposition of any timely and
    authorized motion under Fla. R. App. P. 9.330 or
    9.331.
               _____________________________


Michael J. Arington and Alexander U. Makofka of Eraclides,
Gelman, Hall, Indek, Goodman, Waters & Traverso, Jacksonville,
for Appellants.

John J. Rahaim II and Amie E. DeGuzman of The Law Office of
John J. Rahaim II, Jacksonville, for Appellee.




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