Pre-anesthesia clinic: skip it or not? A case report


Amr Abdullah, MD, Amir Fouad, MSc, FEBA, CABA-IC, DESA,
Ahmed Mamdouh Esmat, MSc, FEBA, CABA-IC,  Ali Elhefnawy, MSc, FEBA, CABA-IC, DESA, FCAI, Shahid Adeel, FCAI

Correspondence: Dr Amr Abdullah
King Hamad University Hospital, Shaikh Isa Bin Salman Causeway, Al Sayh,
Bahrain;
Phone: +973 36553550;
E-mail: amr.abdullah@khuh.org.bh

ABSTRACT
We present a rare case of papillary fibroelastoma (PFE) of the aortic valve diagnosed after being referred from a pre-anesthesia clinic. This patient presented in pre-anesthesia clinic for assessment prior to right total knee replacement. Along with other investigations, echocardiography was ordered as the patient had a previous history of ischemic heart disease with angioplasty. There was no previous echocardiogram (ECHO) in the patient records. An incidental finding of a sclerotic aortic valve with highly mobile mass was seen attached to the right coronary cusp on the aortic side with same echogenicity as the valve. Based on this rare finding, the patient was referred to an interventional cardiac center prior to an elective orthopedic surgery.
Key words: Papillary fibroelastoma; Pre-anesthesia clinic; Echocardiogram; Total knee replacement
Citation: Abdullah A, Fouad A, Esmat AM, Elhefnawy A, Adeel S. Pre-anesthesia clinic: skip it or not? A case report. Anaesth. pain & intensive care 2019;23(2):221-224
Received – 3 April 2019, Reviewed – 7 May 2019, Accepted – 27 May 2019

INTRODUCTION
The preoperative assessment clinic should be used for preoperative evaluation of patients, allowing the anesthetist to decide the most suitable modality of anesthesia to be administered intraoperatively, increasing the safety of anesthesia, and explaining to patients the expected outcomes from anesthesia and addressing any fears they may have. This reduces the total number of surgeries cancelled and increases patient satisfaction (1). The ultimate goals of preoperative assessment are to assess perioperative risk, improve patient status and to decrease the patient’s surgical and anesthetic morbidity or mortality (2).

The aim of this case presentation is to highlight the significance of preoperative anesthesia assessment before surgery, as proper and thorough assessment may be helpful in identifying conditions, which previously may have remained undiagnosed and untreated.

Case Report
We present a case of a 64-year-old male who presented to our pre-anesthesia clinic for assessment prior to an elective right total knee replacement procedure. He had a past medical history of hypertension, type II diabetes mellitus, dyslipidemia, ischemic heart disease, and a history of coronary angioplasty with stenting for an inferior wall myocardial infarction that was performed in 2007.

The patient was taking a number of prescription medication on a regular basis, such as:  Diamicron (gliclazide), Glucophage (metformin), Norvasc (amlodipine), Concor (bisoprolol), aspirin, Preterax (perindopril arginine/indapamide), and Zocor (simvastatin).

On examination, the patient was found to be vitally stable, with a heart rate of 84 bpm, a blood pressure of 114/67 mmHg, and an oxygen saturation of 100% on room air. He was conscious, oriented, no pallor or pedal edema. He was previously physically active and with no cardiac symptoms. The patient had no chest pain, shortness of breathing, or palpitations.

S1 and S2 heart sounds were regular on auscultation, there were no audible murmurs and his chest was clear with bilaterally equal air entry. Lower limb examination was negative, there was no lower limb edema and distal pulses were felt with a regular rhythm.

The only complaint the patient had was chronic bilateral knee pain which was worse on the right when compared to the left. The pain was aggravated on walking or climbing up stairs. Prior to the onset of said pain, the patient was able to walk for 30 to 60 mins without any issues as well as climb at least 2 flights of stairs without feeling out of breath. An ECG was done which showed a regular sinus rhythm with an inferior infarct of undetermined age.

Figure 1: Image of ECG done at pre-anesthesia clinic visit

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An ECHO was ordered on the basis that the patient had a previous history of ischemic heart disease with angioplasty and there was no ECHO in the patient records. Findings showed a normal left ventricular cavity size with a normal global systolic function ejection fraction of 60%. There was normal resting wall motion. A grade 1 left ventricular diastolic dysfunction was apparent, along with sclerotic mitral leaflets, trivial mitral regurgitation and an intact pericardium, which were all typical for the patient’s age and history. An incidental finding of a sclerotic aortic valve with highly mobile mass was seen attached to the right coronary cusp on the aortic side with same echogenicity as the valve, no aortic regurgitation, no significant systolic gradient. The report advised for a differential diagnosis and further evaluation.

Figure 2: Image of ECHO with highly mobile mass

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The patient was referred for a cardiology consultation and was then referred to the cardiac center for further evaluation. Later on, he was transported to the cardiac center along with copies of all documents and investigations.

After a period of four months the patient returned to the pre-anesthesia clinic for assessment for the same procedure. He had undergone a resection of the papillary fibroelastoma of the aortic valve 3 months ago, which included coronary artery bypass grafting (CABG) of 3 arteries: the left anterior descending (LAD), the obtuse marginal artery 1 (OMA 1), and the obtuse marginal artery 3 (OMA 3).

During his visit to the clinic he was doing well with no cardiac symptoms. He was conscious, oriented, no pallor or pedal edema. Vitals were within normal range; a pulse of 90/min, a blood pressure of 110/70 mm Hg with normal heart sounds. He was maintaining an oxygen saturation of 96% on room air.

Post-operative ECHO showed to have normal left ventricular dimensions with post-op septal motion pattern and sluggish basal inferior segment, overall systolic function of 50%-55% and grade 1 diastolic dysfunction. Sclerotic mitral valve leaflets with mild regurgitation. Sclerotic aortic valve with no significant systolic gradient nor regurgitation and an estimated systolic pulmonary artery pressure of 26 mmHg. Patient was advised to continue all his anti-hypertensive medications and discontinue the morning dose of the oral hypoglycemic.

The available anesthetic techniques for the procedure were fully explained to him, which included general and spinal anesthesia. He opted for spinal anesthesia.

Spinal anesthesia was performed using 2.8 mL of heavy bupivacaine 0.5% along with 25 mcg of fentanyl using a midline approach in the sitting position at the level of L3-L4 with a sensory block level of T10. Prior to that, he received 500 mL of ringer lactate (RL) solution as a bolus infusion. He was stable throughout the procedure without any significant decline in blood pressure or heart rate. A total of 2 liters of RL was insfused along with 1 gram of paracetamol. 3 mg of midazolam was given in total, in increments of 1 mg. He was also given 4 mg of  ondansetron as prophylaxis against any post-operative nausea and vomiting. During the procedure the patient was also supplemented with 5 litres/min of oxygen using a facemask. After the procedure the patient was shifted to the recovery station, where he was kept for 45 minutes under close observation and then finally shifted safely to the ward. His overall stay in the hospital remained uneventful.

Discussion
The preoperative anesthetic assessment is a key component of the anesthetic management. The American Society of Anesthesiologists established guidelines describing that each patient requiring care by an anesthetist must be provided a comprehensive medical and anesthetic evaluation, which includes a full drug history, physical examination, proper diagnostic testing, assignment of an ASA physical status score, and formulation and discussion of an anesthetic plan.3 This practice allows for recognition of any disease processes that may alter perioperative anesthetic care and provide a preoperative risk stratification and sufficient preparation to provide safe and adequate anesthesia.

It is important to understand that "perioperative" risk is multifactorial which includes the preoperative medical condition of the patient, the invasiveness of the surgical procedure and the type of anesthetic administered. It is crucial to any preoperative evaluation that patient history be taken and a physical examination performed, with attention to risk factors for cardiac and pulmonary complications to determine a patient’s functional capacity. Laboratory investigations should only be ordered when indicated by the patient’s medical status, drug therapy, or the nature of the proposed procedure and not on a routine basis.2,4 These investigations are performed with the rational expectation that they will be beneficial to patient safety and improve anesthetic management, which would outweigh any potential inconvenience or delay caused.

There are many case reports of incidental findings that altered the patient’s management, leading to favorable outcomes. In one of the published case reports, a 74-year-old female scheduled for an orthopedic procedure was found to have an atrial thrombus diagnosed by a preoperative transthoracic ECHO. She was promptly started on an anticoagulant regime for 5 months until the mass was gone.5 In another case report an aortic valve Papillary Fibroelastoma (PFE) was coincidentally found on routine transesophageal ECHO in a patient booked for a myocardial revascularization procedure. This led to a modified approach to resect the tumor during the revascularization.6 Similarly, a case report has been published by Prifti E et al regarding incidental finding of Mitral valve PFE in a patient who presented with wound infection after Mastectomy. The tumor was subsequently excised, thus reducing the risk of embolization.7
PFEs are benign neoplasms of the valves of the heart, they represent roughly 10% of primary cardiac tumors and are the second most common benign neoplasms of the cardiac valves after myxomas.8-10  They are usually found in the elderly, with a mean age of 60-70 years, but it can occur in any age group.10 PFEs are commonly found incidentally on autopsy or as an intraoperative surgical finding. They are also sometimes discovered during echocardiography or catheterization,8 with transoesophageal ECHO having a tendency to provide a clearer diagnosis.11
85% of PFEs originate from the valvular endocardium, but can also be found on the papillary muscles, the endocardial surface, the ventricular septum, or the chordae tendenae.9 29% of PFE’s originating from the valvular endocardium are most commonly from the aortic valve, 25% from the mitral valve, 17% from the tricuspid valve, and 13% from pulmonary valves.12
 

Despite these tumors being benign in nature, if they are left unidentified, they can carry a very high risk of embolic complications and neurological deficits.13 Direct and indirect symptoms of PFEs can include syncope, angina pectoris, transient ischemic attack, stroke, pulmonary embolism, myocardial infarction, congestive heart failure, and sudden death.8 This is due to the nature of the papillary tissue of the tumor being fragile and pedunculated leading to them being susceptible to thromboembolism. Therefore, once a diagnosis has been made, urgent surgical management is indicated even in an asymptomatic patient.6,14
Conclusion
Comprehensive preoperative anesthetic assessment is essential to any patient scheduled for an elective procedure, as it may identify undiagnosed conditions that may have proven to be detrimental to the patient’s perioperative care.

Conflict of Interest: None.
Authors contributions:
AA:
 manuscript writing, conduction of the case
AF: manuscript writing, literature review
AME: concept, literature review
AE: manuscript writing
SA: supervisor, manuscript editing
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